818 



AETHKOPODA 



PHYLUM YIl 



Fio. 1589. 



Prosbole hirsuta Handl. Upper Permian ; Tichagori, Russia. 

 2/1 (after Handlir.sch). 



(Fig. 1589), and Scytinoirteridae, botli restricted to the Permian, and the Dimorpho- 

 ,-— ^ ptilidae from the Lias. 



Order 39. HEMIPTERA 

 Linnaeus (Heteroptera 

 auct.). (Bugs). 



Terrestrial or aquatic Insects 

 with suctorial mouth 'parts con- 

 sisting of a mobile prognathous 

 beak (the fused palpi of the 

 second maxillae) which contains 

 the setiform mandibles and first 

 maxillae. Antennae never multi- 

 articulate and exhibiting a variety of form, often concealed in aquatic forms. Fore 

 wings covering the abdomen, their apical areas mostly membranous and overlapping, 

 their basal moieties generally coriaceous, with a definitely limited anal area or '■'■ clavus." 

 Hind wings concealed and with a somewhat reduced venation. Body more or less stout 

 and, depressed ; prothorax 

 large ; legs similar, vnth fe%v 

 tarsal joints, and variously 

 adapted as for raptorial, 

 saltatorial, fossorial, or 

 natatory functions ; cerci 

 wanting. 



Two main divisions are 

 recognised, Gymnocerata or 

 terrestrial Bugs, and Crypto- 

 cerata or aquatic Bugs. 

 Both groups are represented 

 in the Mesozoic, but many 

 of these ancient types cannot 

 be included within tlie limits 

 usually assigned to modern 

 families. During the Ter- 

 tiary, on the other hand, no forms existed whicli differ markedly from Recent tyjies, 

 and nearly all of the modern families are here represented. The following named 

 families are among the most important of those occurring in the Mesozoic : 

 t Archegocimicidae (tyj^ified by Archegocimex) (Fig. 1590), f Progonocimicidae, 

 t Eocimicidae, f Eonabidae, f Hadrocoridae, f Cuneocoi-idae, Proboscanionidae, 

 t Apopnidae, f Pachymeridiidae, f Protocoridae, f Sisyrocoridae, f Diatillidae, 

 Coreidae, Nepidae, Belostoiuidae (typified by the genus Mesobelostomum Haase) (Fig. 

 1591), Naucoridae, Notouectidae, and Corisidae. 



Fic. 1500. 



Archegocimex geinitzi 

 Handl. Upper Lias ; Dob- 

 bertiii in Mecklenburg. 

 fi/i (after Handlirsch). 



Fig. 1591. 

 Mesohelostomimi deperdUum Gerniar. 



Upjier Jura ; Solenhofen, 

 (after Deiclnniiller). 



Bavaria. ^/-j 



Order 40. HOMOPTERA Leach. (Plant-lice, Wax-bugs, 



Harvest-fiies, etc.). 



Exclusively terrestrial Insects ivith hypognathous suctorial mouth parts having the 

 same conformation as in the Hemiptera. Antennae usually ivith heteronomous segments, 

 often short and bristle-like. Wings as a rule not overlapping and disposed in a more 

 tectiform attitude, rarely coriaceous; '■'■clavus^' in most forms distinctly bounded. Hind 

 wings generally smaller than the forward pair, sometimes with an enlarged anal lobe. 



