SUBPHYLUM III 



INSECTA 



813 



and Upper Jura by twenty-two species, some of whicli attain considerable size. The 

 genera Prohemerobius (Fig. 1572) and Archegetes Handl. ; and Brongniartiella Meunier 

 (Fig. 1573) are examples. 



Other families of Neuropterous Insects which are restricted to the Mesozoic, such 

 as the Epigambridae, Sqlenoptilidae, Nymphitidae, Kalligrammidae and Mesochryso- 

 pidae, show a certain apj)roximation to Tertiary and modern forms. Members of the 

 now flourishing Osmylidae, Sisyridae, Nymphidae, Hemerobiidae, Coniopterygidae, 

 Chrysopidae, Nemopteridae and Myrmeleonidae have been recorded from Tertiary 

 rocks. The genera Osmyhis Latr. ; Osmy- 

 lidia Cockerell ; Bothromicromus, Tribo- 

 chrysa and Palaeochrysa Scudder are 

 represented in the North American Mio- 

 cene. The last-named genus is represented 

 by four species at the Florissant locality, 

 and Tribochrysa by one. A single species 

 each of Polystoechotes Burm., and Halter 

 Rambixr, has also been described from the 

 same locality. 



t Order 31. MEGASECOPTERA 

 Brongniart. 



Insects ivith slender body, the segments 

 of which are very similar, long antennae 

 and cerci, and homonomous legs. Wing 

 fairs equal, horizontally expanded, venation 

 specialised in that there is a reduced number 

 of branches and cross-veins. 



This is an exclusively Paleozoic group, 

 derived from the Palaeodictyoptera, and 

 probably the progenitor of the next suc- 

 ceeding order. Here belong the families 

 Diaphonopteridae, Corydaloididae, Cam- 

 pyloj)teridae, Mischopteridae (typified by 

 the genus Mischoptera, Brongn.) (Fig. 1574), Raphidiopsidae and Prochoropteridae 



Fu!. 1574. 



Mischoptera voodivardi Brongn, Steplianian (Upper 

 Coal Measures) ; Commentry, France. Ocelli and 

 tarsi restored, i/.j (after Handlirsch). 



Order 32. PANORPATAE Brauer {Mecaptera auct.). (Scorpion-flies). 



Terrestrial Insects ivith orthopteroid mouth parts and long, multiarticidate antennae. 

 Prothorax smaller than the remaining segments; legs similar, ivith five-jointed tarsi; 



abdomen slender, with short cerci and 

 large genital appendages in the male. 

 Wings equal, membranous, without en- 

 larged anal lobe, and with a limited 

 member of secondary branches and cross- 

 veins. 



This order, which is now in a state 

 of decline, is abundantly rejaresented 

 in the Lias and Upper Jura of Europe. 

 Most of the fossil species belong to the 

 family Orthophlebiidae, of which the genera Orthophlebia Westw., and Neorthophlebia 

 Handl. (Fig. 1575) are exanqdes. True Panorpidae and Bittacidae occur in the 



Fig. 1575. 



NeorthophleMa macuUpennis Handl. Upper Lias ; Dob- 

 bertin in Mecklenburg. 5/i (after Handlirsch). 



