-V.M) 



NETJROPTERA. 



In CloS there are but two caudal setse, 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. Ch>e pyijm' Ilagen is 



brownish gray, with the feet and 

 sette white, and the wings hya- 

 line. It is a Canadian species. 

 CcKnifi ditters in having three 

 caudal set;e, with no hind wings 

 developed, and few cross-veins, 

 and the eyes in the males are 

 very simple and remote. Cit'iiix 

 hihii'is Say is small and whitish, 

 with black eyes, and the thorax is 

 \. pale fulvous, with short obscure 

 Y\g. 578. lines beneath and on the sides. 

 Hagen states that the most abnormal Ephemerid is (Miijin i n- 

 n'a, 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 Ladilania. It has 

 two caudal filaments, where Oligonenria has three, and there 

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

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



Mr. Scudder regards as the type of a distinct family, which 

 he calls the Hemeristina, ;i single form, the Hemeristia 

 occidentalfs 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 si/e. 

 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) are as 

 in the Palceopterina, but proportionally broader. Wings 

 large, long, about twice as broad beyond 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. 



