Dec, I902.] COQUILLETT : NeW NoRTH AMERICAN DiPTERA. 189 



Agromyza parvicella, sp. nov. 



Black, the cheeks, sides of face, proboscis, halteres, and knees, yellow, lower 

 part of front yellowish-brown ; thorax opaque, gray pruinose, four pairs of dorsocen- 

 tral bristles, the anterior pair in front of the suture, the hairs between them in two 

 rows ; wings grayish hyaline, veins brown, last section of fourth vein slender, last 

 section of fifth five times as long as the preceding section, small crossvein at two- 

 thirds of length of the unusually small discal cell. Length, 2 mm. 



Habitat. — St. Paul Island, Alaska. 



A single specimen collected by Prof. Trevor Kincaid. Type No. 

 6656, U. S. N. M. 



Agromyza flavonigra, sp. nov. 



Head and its members yellow, an ocellar dot, occiput except the margin, the 

 arista and bristles black ; body yellow, hairs and bristles black, mesonotum black, 

 the sides, front angles, four vittos and spot in front of scutellum yellow, a black 

 humeral dot, an irregular, interrupted vitta on lower part of pleura, large spot on 

 sternum in front of middle coxae, spot on each side of scutellum at base, fascia at bases 

 of abdominal segments three and four, two pairs of dots on segment five and whole 

 of six, black ; mesonotum somewhat opaque, four pairs of dorsocentral bristles, the 

 anterior pair in front of the suture, the hairs between them not in rows ; coxse and 

 femora yellow varied with black, tibiae and tarsi wholly black ; wings hyaline, veins 

 brown and of nearly equal thickness, last section of fifth vein one and one-half times 

 as long as the preceding section ; halteres yellow. Length, 3 mm. 



Habitat. — Beulah, New Mexico. 



Two specimens collected June 29 and in July by Prof, and Mrs. 

 T. D. A. Cockerell. Type No. 6657, U. S. N. M. 



Agromyza varifrons, sp. nov. 



Black, the lower half of front, antennae, face, cheeks, mouth parts, halteres, 

 knees and bases of tarsi, yellow ; mesonotum somewhat polished, two pairs of dorso- 

 centrals, the bristly hairs between them not in rows ; wings hyaline, veins brown, of 

 nearly an equal thickness, last two sections of fifth vein subequal in length. Length, 

 1.5 mm. 



Habitat. — District of Columbia. 



A single specimen collected by the writer. Type No. 6658, U. 



S. N. M. 



Agromyza pruinosa, sp. nov. 



Black, the halteres "and knees yellow, lower half of frontal vitta, antennae, de- 

 pressions of face, lower edge of cheeks and the mouth parts, reddish-yellow ; meso- 

 notum rather densely whitish-gray pruinose, four pairs of dorsocentral bristles, the 

 anterior pair in front of the suture, the hairs between them not in rows ; wings 

 hyaline, veins brown, of nearly an equal thickness, apical portions of third and fourth 



