THE MYCETOPHILID.^ OF NORTH AMERICA. 237 



coalesced part of the media a little longer than the petiole. 

 Tibiae and tarsi api^ear infuscated because of the longitudinal 

 rows of the black setulse; metatarsi of middle and hind legs 

 sparsely ciliate on flexor surface with short setae. Described 

 from a specimen from the Western states. The species was 

 recorded from Kaslo, British Columbia, by Mr. Coquillett. 



3. Ceroplatus clausns Coquillett. 

 1901. clausus, Coquillett, Proc. U. S. Nat. Mus. XXIII. 594. 

 Male and female. Length 7 to 8 mm. Yellow, upper part 

 of head brownish yellow, a black ocellar dot, the antennae, 4 

 indistinct vittae on mesonotum, i or 2 spots on pleura, a fascia 

 at base of each segment of abdomen and knobs of halteres 

 brown ; antennas greatly compressed, the joints except last one 

 wider than long; wings (fig. 82) hyaline, a grayish brown spot 

 fills the cell R2+3 and encroaches on the adjoining cells; sub- 

 costal vein extends considerably beyond the base of the radial 

 sector ; subcostal crossvein close to the humeral, R2+= ends in 

 Ri at about its length before the apex of the latter, costa 

 scarcely extending beyond the apex of R4+5, cubitus forks con- 

 siderably beyond the base of the radial sector. Recorded from 

 New Hampshire and New Jersey by Coquillett. I have speci- 

 mens from Ithaca, New York. 



4. Ceroplatus imlitaris n. sp. 

 Male. Length 8 mm. Face, palpi, posterior margin of eye, 

 and narrow space over base of antennae, yellow ; vertex pos- 

 terior part of head, antenna;, and a slender streak between 

 antennae brown; ocellae area black; basal joint of antenna with 

 tubercle below. Thorax mainly yellow, with 6 dark brown 

 longitudinal stripes, the median pair meeting posteriorly 

 and produced upon the scutellum, sometimes a slender 

 median line between this pair, the latter sometimes 

 connected by a transverse stripe anteriorly ; the first 

 laterals somewhat broader than the median pair; the second 

 laterals on the margin of the mesonotum. narrow, and some- 

 times interrupted, usually reaching the base of the wing, pleura 

 with large brown spot, sternum and margin of the prominent 

 pteropleural lobes infuscated; scutellum and metanotum 

 yellow. Setae on thorax short, black and sparse ; those on 



