318 GEORGE D. HULST. 



ENNOMID/E. 



FERNALDELLIN^. 



This subfamily erected for, and containing the typical genus only, 

 is a very peculiar one iii apparent affinities. In not having vein 5 

 of the hind wings developed, it is placed with the Ennomidse as I 

 have defined that family. The structure of the hind wing in the 

 coalescing of vein 8 with the cell at base is exactly that of the Hy- 

 driomenin?e. There exists also the comparatively rare peculiarities 

 of the prominent tubercle of the clypeus, the clawing of the fore 

 tibise and the bipectinate antennje of the 9 • The vestiture of the 

 head and thorax is the squamose hairy and scale hairy vestiture of 

 the Arctic Hydriomeninie, and the coloration approaches most nearly 

 certain genera of the Ennoininse. 



FER1VAL.DEL,L.A n. gen. 

 Type fimetaria Grt. 



Palpi moderate, slender, with long scales at base, clypeus having 

 a rounded protuberance with a hollow within, with central rough- 

 ened raised space ; tongue developed ; antennae bipectiuated in both 

 sexes ; fore tibise with a strong terminal frontal claw, the tibise them- 

 selves very short and stout ; hind tibise with two pairs of spurs ; fore 

 wings 11 veins, 6 from a point with 7, 8 wanting, 10 from 9, 11 

 from cell ; hind wings 7 veins, 3 and 4 separate, 5 wanting in S ; 

 weak, not tubular in 9 ; 6 and 7 stemmed, anastomosing with cell 

 more than one-half its length in % , not quite one-half in 9 • 



I take great pleasure in dedicating this genus to Dr. C. II. Fernald, 

 of Amherst, Mass., whose ability as an entomologist and worth as a 

 man, command, second to no other, my admiration and respect. 

 Species. — F. fimetaria Grt. 



F. dalachtarla Sti'eck. 



ENNOMIN^. 



The Enuomiiue are the largest of the subfamilies of the Geonie- 

 trina of our fauna. There is among them, moreover, the widest 

 variation in appearance and structure, and they offer the greatest 

 difficulties in classification. 



The sulifamily divides into two groups by the possessing or lacking 

 a peculiar fovea on fore wings beneath near the base of vein \a in 

 the male. It is ordinarily easy to be seen, though there is difficulty 



