THD MYCETOPHILID.t; of north AMERICA. 239 



I. Cerotelion apicalis Adams. 

 1903. apicalis, Adams, Kans. Univ. Science Bull. II. 2. 22. 



(Ceroplatus). 



Male. Length 3.7 mm. Head brownish, anterior part of 

 front, 2 basal joints of antennae, face and mouth-parts yellow; 

 thorax immaculate, reddish yellow, the black pile very short, 

 except on the sides, pleura light yellow, halteres with knobs 

 slightly infuscated; abdomen reddish yellow, base of second, 

 third, fourth, and remainder of apex wholly black; legs light 

 yellow, apical half of tibiae and tarsi wholly blackish ; wings 

 hyaline; smoky towards apex, subcostal, vein ends in the costa 

 about midway between humeral crossvein and base of the radial 

 sector, R2-I-3 ends in costa about midway between tip of Ri and 

 apex of Ri+s, furcation of cubitus almost opposite base of radial 

 sector. Kas. 



2. Cerotelion belluhis Williston. 



1900. hellulus, Williston, Biol. Centr. Amer. I. 219 



(Ceroplatus). 



Male. Length 5 mm. Head black, the narrow face and the 

 palpi brownish. Antennas brownish-black, the first 2 joints 

 somewhat yellowish ; flagellum broad and flattened, about twice 

 the length of the head. Mesonotum not shining, brownish in 

 color; in the middle with 2 coalescent stripes, terminating 

 acutely behind and separated from a moderately broad oblique 

 stripe of the same color on each side by a slender V-shaped 

 brown marking. Pleura light yellow along the noto-pleural 

 suture and below the root of the wing, brown elsewhere. Scu- 

 tellum brownish. Metanotum yellowish. Halteres blackish, 

 with a yellow stem. Abdomen brown, blackish at the tip ; the 

 anterior part of the fourth and fifth segments yellow. Coxae 

 yellow, the distal half of the 2 posterior pairs brown; femora 

 3'ellow ; tibiae and tarsi brownish. The tibiae without bristles. 

 Wings (fig. 83) tinged with brownish; subcostal vein strong, 

 not connected with Ri; the radial sector arising about opposite 

 the middle of the distance between the humeral crossvein and 

 the tip of the subcostal vein, R2-I-3 oblique, terminating a little 

 distance beyond the tip of Ri, the costal section intervening 

 not as long as R-+:> ; the costal vein extends a little distance 



