OF WASHINGTON, VOLUME XVII, 1915 145 



and a fainter one below it, a faint prestigmal mark, not distinct, between 

 median and radial sector; the space between median and cubitus is dark, 

 except for three interruptions; nearly all other veins, especially the cross- 

 veins, have little black spots at intersections and also between intersec- 

 tions. The hind wings are marked very similar to those of S. irroralu* 

 but the spot near the cubital fork is larger and reaches up to the subcost a : 

 behind the median band there is one 'large spot on the margin; the stigmal 

 band is narrow on the costal part, and then much broader and reaches 

 obliquely to the hind margin; the apical spots as in S. irroratus; between 

 the stigmal and median bands there is near the hind margin, a large oblique 

 mark, its upper point directed toward the median band. In fore wings 

 the costals are all crossed, in the hind wings about six near the base are 

 crossed. Expanse 130 mm. 



From Abyssinia, D. Daona. It differs from S. irroratus (of 

 which I have seen the type) in the spotted vertex, the less marked 

 fore wing;, and more heavily marked hind wing, and presence of 

 large spot between median and stigmal bands. 



A NEW SPECIES OF MYCETAULUS 



(Diptera, Sepsidoe.) 



BY NATHAN BANKS. 

 Mycetaulus pulchellus n. sp. 



Head yellowish or rufous, ocellar area black; thorax above and below 

 wholly yellow or pale reddish yellow; abdomen dark brown or black, sinn- 

 ing; legs pale yellowish, unmarked, except that the hind tibia? are rather 

 infuscated on the basal half. Abdomen with fine, short, dark hair mostly 

 on the base; head and thorax with long black bristles, six across vertex. 

 and two proclinate ocellar bristles; thorax with about fourteen, and four 

 on edge of the scutellum, the median pair very long. Wings hyaline, veins 

 brownish, a black spot over the ends of the second and third longitudinal 

 veins; posterior cross vein about two-thirds its length from the margin, 

 and one and a half its length (or more) from the anterior cross-vein. Hal- 

 teres white. Abdomen short and broad, convex, acute at tip. 



Length of body 3 mm., of wing 3 mm. 



From Falls Church, Va., September 28, and Glencarlyn, Va., 

 ( h-tober 7. But one species has been described from North 

 America, M. longipennis Loew from British America; it lias 

 basal dark spot on the thorax, and the mctanotum and pert us 

 dark, and the costal cell is also darkened. The genus, though 

 resembling Sepsis and Nemopoiln differs in lacking auxilliary 

 vein, or rather the auxilliary is united to the first vein. It differs 

 in appearance from Piophila, and in that the fourth vein is not 

 bent up at anterior <-ros<-vein. 



