358 



PSYCHE. 



lune 1S90. 



cescent towards their bases. Face very 

 narrow, tlie eyes almost meeting, covered 

 with whitish dust. Antennae deep velvety 

 black, first joint somewhat slender, third 

 joint broad and hairy, ending anteriorly in a 

 short and blunt point, above which is in- 

 serted the arista. Front metallic green, its 

 edges at first parallel, then diverging pos- 

 teriorly; cilia of the inferior orbit pale. 

 Thoracic dorsum and scutellum bright 

 metallic green, with scarcely any dust; 

 pleurae greenish black, dusted with white. 

 Tegulae with glistening white cilia. Ab- 

 domen short, cylindrical, and like the tho- 

 racic dorsum, bright metallic green, rather 

 thickly covered with stiff black hairs; 

 its terminal segments more blackish; ap- 

 pendages of the hypopygium pale, hairy. 

 Coxae black, with yellow tips, the anterior 

 pairs with tufts of rather long white hairs. 

 Legs very hairy; femora shining metallic 

 green, tips and extreme bases pale yellow; 

 fore tibiae pale yellow; median tibiae grow- 

 ing blackish towards their apices. Anterior 

 tarsi black excepting the base of the meta- 

 tarsal joint, which is yellow; pulvilli not 

 perceptibly enlarged. Hind legs more ro- 

 bust than the anterior, tibiae and tarsi 

 shining blue-black ; each femur with a row 

 of black hairs, running from the base to the 

 apex on the outer edge and increasing in 

 length distally; hind tibiae and tarsi thickly 

 clothed with rigid black hairs ; the former 

 with five spines on the posterior face, the 

 latter robust, not perceptibly tapering till 

 the fourth joint. Peduncles of halteres 

 brown, capitula honey yellow; their tips 

 sometimes blackened, more often only 

 slightly infuscated. Wings grayish hyaline 

 with black veins. 



Habitat : Milwaukee Co., Wis. 



This species is related to C. obli- 

 quiis., Loew, and somewhat more closely 

 to C. ajffi7iis of the same author. It 



differs from both in having the cilia of 

 the tegulae white, from C. obliquns., 

 also in the hirsuteness of the hind 

 tibia and tarsus. 



Chrysotus picticornis, Loew. $ 9 



Length 1.5-2.25 mm.; length of wing 1.75- 



2. mm. 



Palpi pale, somewhat blackened at their 

 bases, and clothed with a few scattered, long 

 blackish hairs; eyes contiguous on the face 

 in the male; face of the female moderately 

 broad, dusted with white and presenting 

 near the oral margin a slight swelling, on 

 each side of which, abutting on the orbit 

 lies a small rectangular black spot. An- 

 tennae in both sexes with the basal joint pale 

 yellow, the two apical joints deep black, 

 clothed with rather abundant pale pubescence; 

 arista inserted apically. Front and occiput 

 metallic green, dulled by a laj'er of yellow- 

 ish dust ; cilia of the superior orbit black, 

 those of the inferior orbit glistening 

 white, very conspicuous in some specimens. 

 Thoracic dorsum and scutellum metallic 

 green, considerably dimmed by a layer of 

 yellow dust, thickest on the anterior portion 

 and on the humeri; pleurae metallic green, 

 inclining to blackish, dusted with white. 

 Tegular cilia black. Abdomen coppery 

 green, not verj' vivid, with the incisures 

 narrowly blackish, the terga covered with 

 short pale hairs which appear black in some 

 lights and are somewhat more appressed in 

 the female than in the male; hypopygium 

 inconspicuous, its longer appendages pale 

 yellow. Legs pale yellow, moderately hairy; 

 fore coxae blackened only at their extreme 

 bases; posterior coxae with their basal halves 

 blackened. Tarsi blackened only towards 

 their tips. Hind femora with prominent 

 preapical bristle. Halteres honey yellow. 

 Wings grayish hj-aline; posterior cross vein 

 a considerable distance in front of the middle 

 of the wing. 



