596 NEUROPTERA. 



In Cloe. there are Imt two caudal setiB, and though there are 



usually four wings, yet the hinder pair are .sometimes wanting, 



and there are few transverse veins. The eyes in the males 



are double, large and approximate. CU/e pygmcea Hagen is 



y^r^K brownish gray, with the feet and 



Hxa^ setae white, and the wings h^-a- 



__.^J ^Xp\y line. It is a Canadian species. 



/^^^>(^~,--'-''''y^J^^f\ Ccenis differs in having three 



^^^~C>^1 / iyy ifpTl caudal setae, with no hind wings 



— ^-^i/l}' i^ developed, and few cross-veins, 



Vj and the e3''es in the males are 



fi very simple and remote. Ccenis 



/ \ hilaris Say is small and whitish, 



/ \ with black e3'es, 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- 



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



large size of the longitudinal veins of the wings, the rarity of 



the transverse veinlets, and by 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 Lachlania. It has 



two caudal filaments, where Oligoneuria has three, and there 



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



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



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

 he calls the Heoneristina, a single form, the Hemeristia 

 occidentalis of Dana, ^vhich 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 prothoras is quadrangular, narrower than the meso- and 

 metathorax, though not proportionally so much so as in the 

 Palceopterina; the femora (probably the front pair) are as 

 in the Paloeopterina, but proportionally broader. Wings 

 large, long, about twice as broad be3^ond the middle as near 

 the 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, 



