I90'] ENTOMOLOGICAL NEWS. I7 



Chironomns halteralis sp. nov. 



Head black, the palpi and antennae yellowish brown, plumosity of male 

 antennae dark g:ray ; thorax dark brown, the anterior end tinged with 

 yellow, a pair of broad, gray pruinose vittae on the posterior half of the 

 mesonotum, the hairs light yellow ; scutellum dark yellow ; abdomen 

 black, slightly polished, thinly covered with rather long yellow hairs . 

 femora, tibiae and tarsi yellow, bases of femora slightly tinged with brown; 

 front tarsi slender, almost as long as the body, destitute of hairs, the first 

 joint abont twice as long as the front tibia ; middle and hind tibias and 

 their tarsi in the male thickly covered with rather long yellow hairs, much 

 sparser in the female ; halteres pale yellow, the knobs black ; wings bare, 

 hyaline, the apical half slightly darker, veins in the basal half yellow, in 

 the apical half more brownish ; length, 2 to 3 mm. Two males and two 

 females. One of the females was collected May 16, 1899, by Mr. F. C. 

 Pratt ; the remaining specimens were collected May 22, June 2 and June 

 6, 1900, by Mr. Herbert S. Barber. 



/i^«^.— Washington, D. C. 



Tjpe : No. 5202, U. S. Nat. Museum. 



Helicobia qnadrisetosa sp. nov. 



Black, the apices of second antennal joints, face and genitalia yellow, 

 frontal vitta dark brown ; front of male at narrowest part three fifths as 

 wide as either eye, face yellow pruinose, third joint of antennae three 

 times as long as the second ; body bluish gray pruinose, thorax marked 

 with three black vittae, the median one almost crossing the scutellum, four 

 pairs postsutural dorsocentral bristles, the bristly hairs very short and de- 

 pressed, abdomen with a blackish dorsal line and reflecting dark spots, 

 second segment bearing a marginal row of small bristles of nearly an 

 equal length and with a much longer lateral bristle, third and fourth seg- 

 ments each bearing a marginal row of bristles of nearly an equal length, 

 longest on the fourth ; first segment of the genitalia in the female also 

 bearing a marginal row of bristles, in the male with a discal row of about 

 six bristles ; male hypopygium very large, polished, the first segment 

 grayish yellow pruinose ; hairs of legs very short, middle tibiae of male 

 each bearing a long bristle below the middle of the outer anterior side, 

 on the posterior side with a short bristle at one-third its length and with 

 a transverse pair of short ones at two-thirds of its length ; hind tibiae each 

 bearing a pair of long bristles on the outer side near one-third of its length 

 and with a second pair near two-thirds of its length in the female with an 

 an additional bristle, situated below the middle of the inner side of each 

 middle and hind tibia ; wings hyaline, costal spine very small, first vein 

 bristly from slightly beyond base of second vein nearly to apex of auxil- 

 iary vein, third vein bristly almost to small crossvein ; length, 4.5 to 6 

 mm. Two males and four females, collected by Mr. F. C. Pratt, in 1899. 



Hab. — Travilah, Md. (June lo and 20) ; Washington, D. C. 



