92 PROCEEDINGS OF THE NATIONAL MUSEUM. voi,. xxv. 



TANYPUS OCCIDENTALIS, new species. 



Brown, the prothorax, a spot near each humerus, and the scutellum 

 dark 3'ellow, legs light yellow, haltere.s whitish ; hairs of autennaj brown 

 and 3'ellow; wings hyaline, bare, first yein not eonneeted with the 

 second b}^ a crossyein; fifth yein forks a short distance beyond the 

 crossyein, the latter situated nearly its length before the small cross- 

 vein; length 4.5 mm. A male specimen. 



Habitat, — Colorado. 



Type.—Q,2it. No. 6170, U.S.N.M. 



TANYPUS GUTTULARIS, new species. 



Head and its members dark ])rown, joints two to four of antenna, 

 apices of the other short ones, and a space before the apex, light yel- 

 low, plumosity brown, changing into whitish at the apices; thorax 

 black, opaque, gray pruinose, mesonotum marked with three indistinct 

 dark yitta3, the middle one divided b}- a median black line prolonged 

 to the scutellum, the latter light yellow; al)domen pale yellowish, 

 first segment with two brown yitta?, the others with a black fascia 

 before the middle of each, hairs of each segment consisting of an ante- 

 rior whorl and a posterier transverse pair of clusters; legs light yellow, 

 coxse black, a brown band before apex of each fenmr and another 

 beyond base of each tibia, apices of tibia3 and of tarsi brown, front 

 tarsi ciliate with several rather long hairs; wings wholl}^ covered with 

 hairs, whitish h^^aline, from base to small crossyein marked with four 

 brown spots, one on humeral crossyein, two in anal cell and one before 

 apex of first basal cell, passing over the crossyein at apex of second 

 basal cell and reaching the wing-margin, where it is greatly extended 

 and rather faint; a brown spot at base of third vein, apex of wing from 

 slightly before tip of first vein grayish brown and containing several 

 whitish hyaline drops; first vein near its tip connected with the second 

 by an oblique crossyein; halteres whitish; length, 5 mm. Two males, 

 collected May 10 by Mr. R. W. Doane. 



Ilahitat. — Pullman, Washington. 



Type.— 0.it. No. 6171, U.S.N.M. 



ORTHOCLADIUS CLEPSYDRUS, new species. 



Black, the extreme bases of femora and of front tibia?, also the other 

 tibiae except their apices, whitish; mesonotum polished, scutellum 

 and dorsum of abdomen opaque, velvet-like; wings h3^aline, each 

 marked with an hourglass-shaped black spot extending from one-fourth 

 length of wing almost to apex of upper branch of fifth yein, the con- 

 stricted portion lying above the forking of the fifth vein, the basal 

 expanded portion reaching from fourth vein nearly to hind margin of 

 wing, the apical extending from third vein almost to hind margin of 



