308 DIPTERA OF NORTH AMERICA. [PART IV. 



Brownisli ; head and thorax dark cinereous above, the latter with obsolete 

 stripes ; the first longitudinal vein ends in the second, not in the costa. 

 Long. Corp. 0.55. 



Syn. PhaJacrocera tijiuJina 0. Sacken, Proc. Entom. Soc. Phil. 1865, p. 241. 



Head considerably narrowed posteriorly, blackish above, with 

 a yellowish-cinereous bloom and a small reddish spot in the middle 

 of the vertex, posteriorly ; the under side of the head is brownish ; 

 proboscis browuish-yellow ; palpi brown ; the antennae, if ex- 

 tended backwards, would reach the end of the second abdominal 

 segment ; they are dark brown or black ; the first half of the first 

 joint and the basis of the third are reddish ; the first joint cylin- 

 drical, elongated ; the second short ; the third and the following 

 joints are elongated, cylindrical, somewhat incrassated on their 

 anterior half, and with the verticils inserted on that incrassation ; 

 the flagellum is clothed on both sides with a very short and soft 

 pubescence (the structure of the antennae is remarkably like that 

 of some TijJulse). Thorax above with a yellowish-cinereous 

 bloom, concealing the blackish ground color ; the latter is more 

 apparent in the place of the usual stripes, whereas the cinereous 

 bloom is more dense in the somewhat impressed intervals between 

 the stripes ; sternum black between the first and second pairs of 

 coxae and this black color extends upwards, in the shape of a 

 stripe over the pleurae ; a black spot near the basis of the halteres ; 

 the remaining portion of the pleuras brownish-yellow ; the whole 

 of the pleurae is covered with a dense hoary bloom, so that 

 their black portions are visible in a certain light only ; collare 

 rather broad, brownish ; scutellum and metanotum brownish- 

 yellow, the latter with a yellowish, shining reflection ; halteres 

 dusky ; coxae yellowish, with a hoary bloom ; femora tawny, 

 yellowish at the basis, and infuscated at the tip ; tibiae brownish, 

 darker at the tip ; tarsi brown. Wings with a brownish-cinereous 

 tinge, stigma pale brownish, small, oblong (the venation has been 

 described among the generic characters). The first longitudinal 

 vein in this species, as in all the Cylindi'otomina, is incurved 

 towards the second, and has, at some distance before the tip, a 

 rather indistinct, slender, oblique cross-vein connecting it with 

 the costa. 



Hah. White Mountains, N. H. ; two male specimens. 



