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Megaloblatta

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About Megaloblatta

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  1. They look like female G. portentosa to me. Have you got a photo of an adult male?
  2. I saw a good comparison someone did some time ago, but now can't find it. It's annoying how images on internet forums disappear..
  3. I am not 100% convinced that those species do hybidize, but they might - especially given that the male genitalia of hissers is similar or identical between species (so the 'lock and key' mechanism preventing hybridisation wouldn't prevent mating). The thing is that there is so much confusion about how to identify hisser species that some people are calling specimens Princisia when they are simply a dark form of G. protentosa. It would therefore not be surprising if they found that these dark individuals successfuly mated with a light form of portentosa... I think that well documented scientif
  4. *How to identify cockroaches* By George Beccaloni (Curator of cockroaches and other orthopteroid insects at London's Natural History Museum), 2016 Identifying cockroaches is often difficult, even for experts, especially if it is a dull coloured species with no distinctive markings which belongs to a group of very similar looking dull species with no distinctive markings and little variation in size or shape... Male genitalia may have to be used to provide a definitive identification, although genitalia are not useful for some groups e.g. hissing cockroaches (Gromphadorhini), as there is litt
  5. The reason why undescribed cockroach species often stay that way for a long time is that there are very few active cockroach taxonomists in the world. There are simply not enough knowledgable people and the few there are don't have the time to name all the many new species that are in museum collections - or indeed which still need to be collected. One estimate ts that there are about 15,000 unnamed cockroach species 'out there' and I can believe it.
  6. Hi Peter, Is the quarterly newsletter/journal of the American Cockroach Society entirely devoted to roaches, or does it cover invertebrates in general? What is the name of this publication? What issue number is it up to? Cheers, George
  7. Blattodea Culture Group membership pays for two issues of the full colour journal Cockroach Studies. The membership fee is realistic for Britain & Europe, but will seem more costly to Americans because of currently unfavourable exchange rates. The BCG Committee is looking into reducing the cost of printing Cockroach Studies and if we can reduce these then the price will obviously come down (The BCG is non-profit making). Best wishes, George Beccaloni
  8. Yes, that is what I would call it - and did call it in something I wrote once.
  9. Hi Matt, No one to my knowledge has tried to hybridize hissing roaches. It would be a a very interesting thing to do, however! You would need to separate females of each of the species you wanted to hybridize from any males when the females were still large nymphs. You would then need to rear them to adulthood, introduce males of the 'other' species you wanted to cross with them, and see if any nymphs appeared in a few month's time. Cheers, George
  10. Your Gromphadorhina looks a lot like portentosa, but I have never seen a black form with redish markings on the sides of the meso- and metanota. The thing to do would be to examine the labrum under a low powered microscope and see whether it is 'hairy'. If you don't have a microscope I would be happy to examine a dead dried specimen for you when one dies. You should send it to me at the following address: Dr George Beccaloni Curator of Orthopteroidea Entomology Department The Natural History Museum Cromwell Road South Kensington London SW7 5BD, UK It would be worth trying to tr
  11. If you have tried to join the BCG recently and have sent payment to the Membership Secretary Roland Dusi by PayPal then please read on…. The email address which was listed on the BCG Website and elsewhere as the one to use to send your PayPal payment to (i.e. Roland.Dusi@aol.com) was incorrect. The correct address is RolandDusi@aol.com Please check your PayPal account to see what the status of your payment is. If it is “pending” then please cancel it and resend it to the correct address. Thanks, and sorry for the unfortunate mistake! Full details of how to subscribe to the BCG can be found h
  12. I've had a look at the photos and can identify one, and possibly a second. Going from left to right the species are as follows:- Colapteroblatta nigra (Brunner von Wattenwyl, 1892) - Epilamprinae Possibly Euthlastoblatta near absimilis (Gurney, 1937) - Blattellidae Blattellidae Epilamprinae The following species are recorded as being found in the Grenadines according to the Blattodea Species File:- Hemiblabera brunneri Saussure 1869 (Blaberidae, Blaberinae) Colapteroblatta nigra Brunner von Wattenwyl 1892 (Blaberidae, Epilamprinae) Epilampra abdomennigrum De Geer 1773 (Blaberid
  13. I should clarify: Prosoplecta are actually found in the Philippines, Malaysia and Indonesia (see my cockroach catalogue http://blattodea.speciesfile.org/HomePage.aspx), but most of the best mimics seem to come from the Philippines. The only Philippine islands they seem to have been recorded from are Mindanao and Luzon, although they are almost certainly found on others too.
  14. The very best beetle mimicking roaches are Prosoplecta from the Philippines. These are excellent mimics of distasteful ladybird beetles (Coccinellidae). Illustrations of some of the species can be found on pages 22 and 23 of issue 1 of Cockroach Studies. A pdf is available to download free from here:- http://www.blattodea-culture-group.org/node/802 I have been trying off and on for years to obtain livestock of Prosoplecta, with no luck so far! I don't know anyone who has ever kept them in captivity. George Beccaloni
  15. There are dozens (if not hundreds) of species of aquatic roaches, all of which belong to the Blaberidae subfamily Epilamprinae. They are found throughout the tropics in rainforest habitats and I have personally collected them in Ecuador (from water-filled bromeliads), and in Papua New Guinea, Madagascar and Malaysia (under stones beside forest streams). Some species are more aquatic than others e.g. Epilampra abdomennigrum from Costa Rica actively swims and dives below the surface of water, whilst Stictolampra trilineata from Papua New Guinea climbs over submerged rocks (probably because it li
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