AMERICAN DIPTERA. 317 



46. P. scoparius n. sp. 



cf. Similar to unguiculatus in general build and color. Front with 

 yellowish tinge. Abdomen narrower, without the cinereous marks ; the 

 bristle-like hairs are more numerous and distinct ; lateral comb of first 

 segment long and black. Hypopygium much smaller than fifth, more 

 symmetrical, but distinctly cleft. Post-trochanters with tuft of minute 

 bristles or hairs (Fig. 131) below near base. Wings grayish. Length, 

 3.3 mm. ; wings, 3.8 mm. 



9 . Very similar to those placed under similis Hough, but more 

 slender and occiput more swollen ; the abdomen is narrower in propor- 

 tion, less constricted at incisures, and more thickly hairy ; the ovi- 

 positor is shorter, extending only to second segment (Fig. 114). Length, 

 2.5-2.8 mm. ; wings, 1.9-2.5 mm. 



Type.—&. Eastport, Me., July 15 (Figs. 39, 131, Johnson, 

 B. S. N. //.). 



Paratypes. — Edgarton, Mass. (19, Fig. 114, Johnson, B. 

 S. N. H.); Beaverkill, N. Y. ; (1 9, Cresson, A. N. S.); 

 Falls Church, Va. (Id 1 , coll. Banks). 



This species may be similis, but the hypopygium cannot 

 be said to be very assymetrical. I am not at all certain that 

 these females belong here. 



47. P. insularis n. sp. 



o". Frontal triangle, face and lower occiput silvery,. Antennae 

 with second joint black, third brownish and long whitish acuminate 

 (Fig. 41). Mesonotum shining, distinctly brown pollinose, lateral 

 margins with minute black bristles ; humeri whitish ; pleura? and 

 metanotum more opake and gray ; halteres yellow. Abdomen semi- 

 shining, distinctly microscopically transversely rugulose, clothed with 

 minute suberect black bristle-like hair, and microscopically brown 

 pubescent, the pubescence wanting in minute spots at the base of each 

 black hair, sometimes these spots coalescing (this takes very high 

 magnification to detect) ; first segment with lateral comb of about four 

 long black bristles ; fifth segment slightly longer than fourth. Hypo- 

 pygium as long as fifth segment, symmetrical in outline, somewhat 

 hemispherical, thickly and evenly whitish pollinose, cleft to right (Fig. 

 105). Legs simple, black, except the yellow apices of femora, bases 

 of tibia?, and tarsi ; femora and tibia? more or less grayish. Wings 

 hyaline (Fig. 169). Length, 3.0 mm. ; wings, 2.7 mm. 



9 . Similar with upper half of vertex shining black ; ovipositor 

 (Fig. 106) yellow, as long as its base and extending to apex of third 

 segment ; fore femora with two minute, light colored bristles near 

 base beneath. 



Type. — <?. Hamilton Parish, Bermuda Islands, May, 1909 

 (Figs. 41, 105, 169, 5. Brown, A. N. S., No. 5029). 



TRANS. AM. ENT. SOC, XXXVI. JANUARY, 1911 



