SUBPHYLUM III 



INSECTA 



813 



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

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

 (Fig. 1573) are examples. 



Otlier families of Neiiropterous Insects which are restricted to the Mesozoic, such 

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

 pidae, show a certain approximation to Tertiary and modern forms. Members of the 

 now flourishing Osniylidae, Sisyridae, Nymphidae, Hemerobiidae, Coniopterygidae, 

 Chrysopidae, Nemopteridae and Myrmeleonidae have been recorded from Tertiary 

 rocks. The genera Osmylus Latr. ; Osmy- 



lidia Cockerell ; Bothromicromus, Tribo- ^,^^^^^^__ / \/\ 



chrysa and Palaeochrysa Scudder are <^^^^^^^^^s^M^^ 

 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 

 Eambur, has also been described from the 

 same locality. 



t Order 31. MBGASBCOPTERA 

 Brongniart. 



Insects lüith slender body, the segments 

 of which are very siviilar, long antennae 

 and cerci, and homonomous legs. Wing 

 pairs equal, horizontally expanded, venation 

 specialised in that there is a reduced numher 

 of branches and cross-veins. 



This is an exclusively Paleozoic group, 



derived from the Palaeodictyoptera, and 



probably the progenitor of the next suc- Fig. 1574. 



ceeding order. Here belong the families Mischoptera woodtmrdi Brongn. Stephanian (Upper 

 -rv- 1, + -1 /-^ ;i 1 'j-i n^^ Goal Measures) ; Commentry, France. Ocelli and 



Diaphonopteridae, Corydaloididae, Cam- tarsi restored. v, (after Handiirsch). 



pylopteridae, Mischopteridae (typified by 



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



Order 32. PANORPATAB Brauer (Mecaptera auct.). (Scorpion-flies). 



Terrestrial Insects with orthopteroid mouth parts and long, multiarticulate antennae. 

 Prothorax smaller than the remaining segments; legs similar^ lüith five-jointed tarsi ; 



abdomen slender, with short cerci and 



r „„ ^^ ^ . r== : large genital appendages in the male. 



Wings equal, membranous, without en- 

 larged anal lobe, and with a limited 

 number of secondary branches and cross- 

 veins. 

 CH 



This Order, which is now in a state 

 of decline, is abundantly represented 

 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 examples. True Panorpidae and Bittacidae occur in the 



Fia. 1575. 



Neorthophlebia maculipennis Handl. Upper Lias ; Dob- 

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



