120 MAINE STATE COLLEGE 



gether absent. 1. A rounded spot in the marginal cell, above the 

 origin of the rivulet; 2. Upon the longitudinal axis of the submar- 

 ginal cell an indentation in the inner margin of the section bordering 

 the apex of the wing; 3. Upon the longitudinal axis of the first pos- 

 terior cell an interruption of the rivulet at its origin and an indenta- 

 tion in the inner margin of the portion bordering the apex of the 

 wing; 4. Upon the longitudinal axis of the discal cell a narrow in- 

 terruption of the section, running again towards the anterior mar- 

 gin; 5. The spot upon the posterior margin connects the first, de- 

 scending, portion, with the second, which rises again upwards. The 

 first and third longitudinal veins are bristly; the third and fourth are 

 parallel towards their end, both very gently curved backwards; 

 the section of the fourth vein preceding the discal cell is gently, but 

 rather distinctly arcuated backwards, so that the shape of the discal 

 cell somewhat reminds of that of the species of Eivellia; the cross- 

 veins are comparatively rather long, moderately approximated, their 

 distance being about equal to the length of the posterior crossvein; 

 the latter is rather steep, however, perceptibly approximated to the 

 apex with its anterior end, more than with the posterior; the pos- 

 terior corner of the anal cell is very much drawn out in a point. 



Male Fly — Pale clay yellow to pale orange. Smaller than the 

 female and the color and wing picture the same but paler. The 

 head and eyes as in the female. In front view about as long as 

 broad with mouth up, anterior distance between the eyes only half 

 as great as the posterior. The three ocelli brownish. Three Ion" - , 

 weak black bristles upon the border of the front as in the female. 

 On the occiput just above the neck are two clusters of six black hairs 

 each, that lie parallel to each other. The antennae darker yellow 

 than the head. The terminal joint twice as long as broad, rounded 

 at the end and not reaching the mouth. Palpi and rostrum yellow 

 the former not reaching beyond the mouth. Arista black, pubescent 

 yellowish at the base. 



The thoracic dorsum bears a faint double median stripe and also 

 a narrow lateral stripe. The pollinosity in our specimens seems to be 

 continuous over the whole surface and not absent from the stripes as 

 described by Loew. The entire thoracie dorsum covered with short 

 black hairs excepting the posterior portion. The scutellum is 

 naked excepting that it bears four long black bristles. Post border of 

 scutellum dark colored and together with a median dark stripe on the 

 posterior metathorax makes a T shaped marking. Sides of thorax armed 

 with five long black bristles. Four shorter weaker hairs on anterior 

 of thorax. Halteres pale. 



Femur of the anterior pair of legs armed with long black bristles. 

 Femur of other legs unarmed. The two posterior legs darker. Ab- 

 domen oblong, arched, width to length as 5:S. Composed of six seg- 

 ments, ratio 3:4:4:4:5:2. The basal bears an obscure median dorsal 

 brown spot. The posterior portion of the abdomen darker yellow. 



