Sept. is 9 s] Coquillett: On a New Genus of Diptera. 18 7 



anything to do with it since undeveloped soft winged green females, 

 as well as cream colored ones have been found. Hind wings and 

 vestiture not subject to noticeable variation, nor the underside of pri- 

 maries and secondaries, which differs only slightly in deeper or lighter 

 shading. 



[Note. — This larva has occurred to me in the Adirondacks on the 

 balsam fir. Its pattern of markings and coloration are strikingly like 

 those of the pine-feeding Sphingidse, doubtless in adaptation to the 

 similar environment. H. G. Dyar.] 



A NEW DIPTEROUS GENUS BELONGING TO THE 

 THEREVID^. 



By D. W. Coquillett. 



rienicomyia, gen. nov. 



Antennae slightly longer than the thorax, cylindrical, first joint two-thirds as long 

 as the head, the second broader than long, one-fifth as long as the first, third joint of 

 nearly an equal diameter until near the tip, almost twice as thick as the first joint 

 and nearly four times as long, the apical portion tapering gradually to the tip which 

 is truncated and destitute of a style ; head nearly twice as broad as long, face bare ; 

 proboscis rather slender, the labella of about the same diameter as the proboscis 

 proper, the two together slightly longer than the head ; palpi slender, their apices 

 considerably dilated ; three ocelli present. Abdomen slender, fully three times as 

 long as the thcrax. Wings with two submarginal and five posterior cells, the fourth 

 posterior and anal cells closed and short petiolate. Type, the following species : 



Henicomyia hubbardii, sp. nov. 



$ . Head black, front somewhat polished, at narrowest part one-third as wide as 

 either eye, antennae yellow, the second joint and apical portion of the third, brown ; 

 proboscis brown, the under side of the basal portion yellow ; palpi brown, the apices 

 yellow ; a row of black macrochaatae extending around the upper half of the occiput. 

 Thorax and scutellum yellow, polished, a white pruinose vitta in middle of dorsum of 

 thorax, considerably expanded behind the suture, and a white pruinose spot on upper 

 part of the pleura in front of the insertion of each wing ; a black macrochaeta above, 

 and another in front of, the insertion of each wing, thorax elsewhere, and the scutel- 

 lum, bare. Abdomen black, polished, the extreme base yellowish, the posterior 

 margins of the first four segments white ; hypopygium nearly twice as long as the 

 seventh, or last, abdominal segment. Wings hyaline, a brown cloud on veins at apex 

 of second basal cell, and a brown fascia extending from the costa, a short distance 

 before the apex of the second vein, to the base of the third posterior cell. Coxae yel- 

 low, the posterior ones largely brown and covered with a silvery-white pruinosity ; 



