818 



ARTHROPODA 



THYLUM VII 



(Ki, ,589), and Scytinoptcidae, .oü. .stncted ^ ^^^'^ ^^'''-^''- 



Order 39. HEMIPTBRA 

 Linnaeus (Heferoptera 

 auct.). (Bugs). 



Terrestrial or aquatic Insects 

 with sudorial mouth parts con- 

 sisting of a mobile prognathous 

 heak {the fused palpi of the 

 second maxiUae) which contains 

 the setiform mandihles and first 

 maxiUae. Äntennae never multi- 

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

 wings covering the ahdomen, their apical areas mostly memhranous and overlapping,^ 

 their basal moieties generally coriaceous, luith a definitely limited anal area or " clavus." 

 Hind wings concealed and loith a somewhat reduced venation. 

 and depressed ; prothorax 



Fig. 1589. 



Proshole hirsuta Handl. Upper Permian ; Tichagori, Russia. 



2/i (after Handlirsch). 



J^^^. 



Body m,ore or less siout 



large ; legs similar, with few 

 tarsal joints, and variously 

 adapted as for raptorial, 

 saltatorial, fossorial, or 

 natatory functions ; cerci 

 wanting. 



Two main divisiojis are 

 recognised, Gymnocerata or 

 terrestrial Bugs, and Crypto- 

 cerata or aquatic Bugs. 

 Both groups are represented 

 in the Mesozoic, but many 

 of tliese ancient types cannot 

 be included within the limits 

 usually assigned to modern 

 families. During the' Ter- 

 tiary, on the other hand, no forms existed which differ markedly from Recent types, 

 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 (typified by Archegocimex) (Fig. 1590), f Progonociniicidae, 

 t Eocimicidae, f Eonabidae, f Hadrocoridae, f Cuneocoridae, Proboscanionidae, 

 t Apopnidae, f Pachymeridiidae, f Prötocoridae, f Sisyrocoridae, f Diatillidae, 

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

 1591), Naucoridae, Notonectidae, and Corisidae. 



Fig. 1590. 



Archegocimex geinitzi 

 Handl. Upper Lias ; Dob- 

 bertin in Mecklenburg. 

 6/i (after Handlirsch). 



Fig. 1591. 



Mesobelostomum deperditum 

 Upper Jura ; Solenhofen 

 (after Deichmüller). 



Germar. 

 Bavaria. '^/-^ 



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

 Harvest-flies, etc.). 



Exclusively terrestrial Insects with hypognathous suctorial mouth parts having the 

 mme conformation as in the Hemiptera. Äntennae usually with 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. 



