78 PROCEEDINGS OF THE NATIOiSTAL MUSEUM vol. G8 



Described from the following: In the collection of the National 

 Museum; one male from Hood River, Oregon, one female from Mount 

 Constitution, Washington, July 17, 1909 (J. M. Aldrich) ; one male 

 from Pine Lake, southern California (Johnson). In the Canadian 

 National collection; one female, Lillooet, British Columbia, 26-vii- 

 1917 (J. D. T.), 3,000 feet; another female and one male from same 

 locality 23-vii-1917 (J. D. Tothill) 1,500 feet; one male and one 

 female, Victoria, British Columbia, 2-vii-1921 (W. Downes) ; two 

 males labelled Pehticton, 18-vi-1918 (W.B.Anderson). In the col- 

 lection of the writer one male from Hood River, Oregon. 



Genus HILARELLA Rondani 



Hilarella Rondani, Dipt. ital. Prodr., vol. 1, p. 70, 1856; vol. 3, p. 212, 

 1859. Genotype MiUogramma zetterstedti Rondani, which according 

 to Bezzi and Stein, Palaark Dipt., vol. 3, p. 514, 1907 equals hilarella 

 Zetterstedt. 



This genus differs from all but two of the North American genera 

 of Miltogramminae, namely Opsidiopsis and Taxigramma, in having 

 the last section of the fifth vein distinctly more than half the length 

 of the preceding section. It is readily distinguished from Opsidiopsis 

 by the absence of a definite row of bristles on the first vein. From 

 Taxigramma, to which it is morphologically very closely related, it 

 differs in having the appendicular fold of the fourth vein shorter 

 than the discal cell, and the last section of the fifth distinctly less 

 than the length of the preceding section. Other generic characters 

 are as follows : a single frontal row on either side of the vitta, descend- 

 ing below the base of the antennae, suddenly divergent below; pro- 

 clinate ocellars present; orbital bristles in both sexes; vibrissas 

 inserted less than length of second antennal joint above front edge 

 of oral margin; facial ridges with bristly hairs on less than the lowest 

 fourth; antennae extending to less than length of second antennal 

 joint from the vibrissae; penultimate joint of arista scarcely longer 

 than broad; in profile, the head length at the vibrissae distinctly 

 less than at base of antennae; no pale hairs on bucca or back of head 

 about the oral cavity; proboscis stout and much shorter than the 

 head height; thorax with two sternopleural bristles; abdomen densely 

 pollinose, with transverse rows of sharply defined black spots; wings 

 with apical cell closed and ending far before the extreme tip of the 

 wing; mesotibia with a single bristle on outer front side near the 

 middle. 



In this genus there are several European species, one of which 

 also occurs in the North American fauna. 



