AMERICAN NEUROPTKRA. 121 



front of the movable hook, a relic of the former articulation. Cor- 

 diilia shurtleffij (PI. VII, Fig. 3 «) has the hook wider and blunter, 

 with the hairs very al)undant. Pseudophlebia minima (PI. VII, 

 Fig. 3 c) is deeply chitinized along the inner border of the lateral 

 lobe, and the hook is short and sharp. It differs from Micrathyria, 

 however, in the absence of hairs on the surface of the lateral lobe. 

 This group is much more siiecialized than any of the others, and is 

 difficult of comparison, as the changes, especially in the lateral lobe, 

 have almost obliterated the hooks. 



The aEschninte present characteristics widely different from those 

 just mentioned. The width of the mentum and ligida is usually 

 1.25 times its length, and the cleft, though ordinarily absent, is 

 always indicated either by a slight depression in the center of the 

 ligula or by the arrangement of the hairs along its border. Some 

 times, however, a short but distinct apical cleft is present. The 

 movable hook is well developed ; it is short, thick, usually blunt 

 and, upon the lateral lobes on either side of it, is developed a more 

 or less well-defined angulation. Both lateral lobes and ligula ai'e 

 covered with numerous hairs. A very good representative of the 

 group is Gyuacantha trifidia (PI. VII, Fig. 4). In Corypha'schita 

 ingens (PI. VII, Fig. 4 «) the movable hook is unusually large and 

 the end hook is large and recurved. The ligula (PI. VII, ¥W. 

 4 6) shows a slight elevation in the middle of its border, with a short 

 cleft in the center. In ^Ijschinophlebia anlioptera (PI. VII, Fig. 4c') 

 the end hook is large and clearly defined, but the lobe beside it is 

 comparatively small. The lateral lobes of jEschna coiistricta (PI. 

 VII, Fig. 4(f) differ little from those of Gynaeantha, but the ligula 

 (PI. VII, Fig. 4e) shows a more marked depression in the middle 

 of its front border. Basioischiia Janata (PI. VII, Fig. 4/') shows 

 the inner hook very strongly developed, while the lobe is almost 

 absent. 



GOMPHIX.E. 



The Goniphinre, belonging to the same family as the ^Eschninie, 

 have many points of similarity with them. The combined mentum and 

 ligula is 1.4 as wide as it is long, and the cleft in the ligula is always 

 absent. The lateral lobe (exclusive of end hook) is about 1.25 times 

 as long as wide, and the movable hook is large and well developed. 



TKANS. AM. ENT. SOC. XXX. (16) MAY. 1904 



