192 Journal New York Entomological Society. [Voi. vii. 



Euaresta bellula Sno7t>. California. 

 Euaresta pura Loezv. Massachusetts. 

 Urellia abstersa Loeiv. S, D., la., Minn., N. M. 

 Urellia pacifica, sp. nov. (PI. IV, Fig. lo). 



$ . 9 . Brown ; front yellow or brownish yellow ; face lighter yellow ; mouth 

 opening rather large ; proboscis short ; palpi short but rather prominent ; antennce 

 yellow, short, third joint but little longer than broad; arista brown, yellowish at 

 base ; ground color of the thorax and the scutellum black, but so thickly covered 

 with a brown pollen as to make it appear light brown in color ; pile whitish, short, 

 rather sparse ; humeri and usually a spot in front of base of wing yellowish ; scu- 

 tellum with two strong and two weak brownish bristles ; legs dark reddish yellow. 

 Abdomen somewhat darker, the whitish pile a little longer and thicker than on the 

 thorax ; ovipositor shining black, also with whitish pile, flattened, about as long as the 

 two preceding segments taken together. Wings whitish hyaline, distal two-thirds, 

 with a brown picture which emits eleven rays ; the first is very broad and runs from 

 the anterior cross-vein across the stigma to the costa, the second is short and nanow 

 and reaches the costa midway between tips of the first and second veins ; the third is 

 very broad and contains a small hyaline dot just beyond the tip of the second vein ; 

 the fourth and fifth end upon the tips of the third and fourth veins ; the sixth and 

 seventh cross the second posterior cell ; the eighth follows the posterior cross-vein ; 

 the ninth, tenth and eleventh, which are less distinct, cross the third posterior cell, 

 the ninth sometimes reaching the posterior margin ; a large hyaline drop in the first 

 posterior cell just in front of the posterior cross-vein and sometimes smaller drops on 

 other portions of the picture ; stigma yellowish in extreme apex ; first vein only with 

 bristles. Length, $ 2.5 to 3 mm., J 3 to 3.5 mm. Two males, seven females. 



Urellia aldrichii, sp. nov. (PL IV, Fig. 11). 



$ . 9 • (jray ; head and its appendages yellow ; front with a brownish tinge ; 

 slightly narrowed anteriorly ; face lighter, excavated ; oral opening large ; margin 

 projecting; palpi rather long ; proboscis short; antennce short, third joint rounded, 

 but little longer than broad ; arista brown, yellowish at base ; bristles of front and 

 vertex brown. Thorax gray ; humeri and pleura yellowish ; scutellum with four 

 bristles narrowly margined with yellow and yellow on under side ; metanotum black 

 with whitish pollen ; legs wholly reddish yellow ; the white pile on abdomem longer 

 and thicker than that on the thorax ; ovipositor black with a little pile, broad, flat- 

 tened, but little longer than the preceding segment. Wings whitish h>aline, the 

 brown picture resembling somewhat Urella pacifica with the following differences : 

 Lighter brown ; the first broad ray originates some distance before the anterior cross- 

 veins ; the ninth, tenth and eleventh rays are less distinct; the hyaline spaces are 

 more numerous and larger ; the picture is darker on the stigma and along the veins ; 

 the first and third with bristles. Length, $ 3 mm., 9 3-5 to 4 mm. Five males, 

 four females. 



Habitat : South Dakota. 



