596 NEUROPTERA. 



In CloU there are but two caudal setse, and though there are 

 usually four wings, 3'et the hinder pair are sometimes wanting, 

 and there are few transverse veins. The ej'es in the males 

 are double, large and approximate. Gloe j^ygmcea Hagen is 



brownish gray, with the feet and 

 setae white, and the wings hj^a- 

 line. It is a Canadian species. 

 Ccenis ditfers in having three 

 caudal setse, with no hind wings 

 developed, and few cross-veins, 

 and the e^^es in the males are 

 ver}' simple and remote. Ccenis 

 hilar is 'Say is small and whitish, 

 with black e^yes, and the thorax is 

 pale fulvous, with short obscure 

 Fig. 578. lines beneath and on the sides. 

 Hagen states that the most abnormal Ephemerid is OUgoneu- 

 via, distinguished by the abortive condition of the legs, the 

 large size of the longitudinal veins of the wings, the rarit}' of 

 the transverse veinlets, and b}' a long bristle-like appendage 

 at the base of the fore wing. A closely allied genus has been 

 described by Dr. Hagen under the name Laclilania. It has 

 two caudal filaments, where Oligoneuria has three, and there 

 are three strong transverse veins in the fore wings. L. abnor- 

 mis Hagen (Fig. 578, enlarged) is a Cuban species. 



Mr. Scudder regards as the type of a distinct famil}^, which 

 he calls the Hemeristina, a single form, the Ilemeristia 

 occidentaUs of Dana, which occurred with Miamia Bronsoni in 

 the Lower Carboniferous rocks of. Illinois. Mr. Scudder de- 

 fines this family as consisting of " Neuroptera of large size. 

 The prothorax is quadrangular, narrower than the meso- and 

 metathorax, though not proportionally so much so as in the 

 Palceopterina; the femora (probably the front pair) areas 

 in the Paloeojiterina^ but proportionally broader. Wings 

 large, long, about twice as broad beyond the middle as near 

 tiie base, the costal border convex in its outer half, with nu- 

 merous and prominent cross-veins but no reticulations ; when 

 at rest, overlapping quite completely, even close to the base, 



