23 



posterior dorso-centrals, a humeral, post-humeral, presuteral, one post-alar 

 and two supra-alar bristles; scutellum with four marginal bristles. Abdomen 

 black, opaque, with black hairs, which are larger along the lateral and posterior 

 margins. In the female the third segment is nearly double the length of the 

 second while in the male they are about equal. Genitalia of the male rounded, 

 with two long projections which extend along the venter to the posterior 

 margin of the third segment. Legs dark brown, in the female light brown; 

 the anterior femora thickened, shining, the middle and posterior femora but 

 slightly thickened. All of the femora with prominent rows of flexor and 

 extensor bristles; tibial spurs large. Wings brownish, the venation typical 

 of the Scatomyzidae. Length: (^, 6 mm.; 9 6.5 mm. 



Five specimens: holotype, Essex, Massachusetts, May 7, 1920 

 (A. B. Fuller). Allotype, ''Narrows," Mt. Desert, Maine, August 

 13, 1920 (C. W. J.). Paratypes, ( 9 ) Cohasset, Massachusetts, 

 May 16, 1904 (Owen Bryant), and two (cJ^, ?) Hampton Beach, 

 New Hampshire, May 3, 1922 (C. E. White, Jr.). Types, four 

 in the collection of the Boston Society of Natural History and one 

 (Hampton Beach, New Hampshire) in the author's collection. 



The flattened mesonotum and scutellum, and the stout legs 

 suggest the genus Coelopa, but the smooth face, shape of the 

 head, more numerous thoracic bristles, the rounded abdomen 

 and shape of the genitalia, clearly show that it belongs to the 

 family Scatophagidae. 



The species seems to be confined to the salt marshes of our coast. 

 At Mt. Desert it was associated with Ceratinostoma ostiarum Hali- 

 day, Cirrula gigantea Cresson, and other maritime species. Another 

 interesting species taken at the same time was Clanoneurum 

 cimiciformis Haliday. 



Micropselapha (?) albifacies, sp. nov. Fig. 5. 



C^. — Head pointed, frontal stripe depressed, dark brown and about one-half 

 of the total width of the front; orbits grayish pruinose, bearing three bristles 

 of equal size; two ocellar bristles, and two large vertical bristles back of the 

 upper angle of the eye; face white, strongly receding; cheeks and vibrissae 

 white; palpi light yellow; occiput nearly as wide as the eye, black, grayish 

 pollinose; antennae black, third joint about four times as long as the second, 

 with a whitish pubescence and a dull yellowish base; arista black, with a 

 short, sparse plumosity. Thorax black, grayish pollinose, dorso-centrals 1-3, 

 scutellum with two long bristles; bristles of the pleura white. Abdomen black, 

 grayish pollinose, hairs white. Genitalia light yellow; the V-shaped process 

 extends beneath to the posterior margin of the third segment. Legs including 

 the coxae light yellow; hairs, bristles and tarsi blackish. Halteres yellow. 

 Wings hyaline, with very fine hairs, veins brown. Length 2.5 mm. 



