276 Professor Williston on tJte 



2. Tanypus indecisus, n. sp. (PI. IX., fig. 35, wing.) 



^ , $ . Wings hairy ; posterior forked cell not petiolate ; front 

 metatarsi shorter than their tibiaj. Head and basal joint of the 

 antennae reddish-yellow ; palpi and the remainder of the antennae 

 brownish-yellow ; antennal plumosity of the male grey, towards 

 the tip blackish. Thorax reddish-yellow ; bare, opaque, with three 

 slender, reddish-brown stripes in front, separated by ashy intervals ; 

 on each side posteriorly with an elongate brown spot, the middle 

 of which is ashy ; scutellum light yellow ; metanotum brownish- 

 red. Abdomen slender ; opaque brown, the posterior angles and 

 borders of the segments ashy ; the yellow of the venter some- 

 times encroaches upon the brown of the dorsum ; sixth and 

 seventh segments more distinctly yellow ; the seventh and eighth 

 segments with the posterior portion blackish. liCgs yellow, less 

 hairy than in T. flaveolus. Wings hyaline, moderately hairy. 

 Length lj-2j mm. 



Ceratopogon. 

 Meigen, Illiger's Mag., ii., 1803. 



Table of Species. 



1. Two subcostal cells, that is. the third vein is either con- 



tiguous or connected by a cross-vein with the first 



vein ?i 



One subcostal cell ; the third vein is distinctly separated 

 from the first throughout its course, and is not con- 

 nected with it by a cross- vein 2 



2. A small, round, black spot just back of the tip of the 



third vein pundipeiinis^ n. sp. 



No such spot veiiuHtulus, n. sp. 



3. Metatarsi shorter than the following joint ; wings hairy . . 4 

 Metatarsi much longer than the following joint 



4. Antennae not longer than the mesonotum ; wings densely 



hairy eriophonis, n. sp. 



Antennae distinctly longer than the mesonotum .'> 



5. Abdomen banded ; hind metatarsi about one-half the 



length of the following joint . . . proj^inquus, n. sp. 

 Abdomen not banded ; hind metatarsi about one-third the 

 length of the following joint ; tarsi very slender 



flavus, n. sp. 



