1912] Johnson— North American Dipfera 3 



One specimen, Woodworth Lake, Bleecker, N. Y., August 19, 1909, collected by 

 Charles P. Alexander. 



This species is placed here provisionally awaiting more material. It seems 

 strange that two species taken at the same time and place should resemble each 

 other so closely in color. The five posterior cells would indicate its place in this 

 genus, but the antennae and genitalia are quite different from the typical 

 Cyhndrotoma. 



EUiptera alexanderi sp. nov. (Figure 5.) 



Male. Rostrum and palpi black, antennae light yellow, the second and 

 third joints globose, flagellum slender, verticils long, tip of the flagellum brown. 

 Thorax yellow with three broad, brown stripes, the middle one obscurely divided 

 before the suture; scutellum and metanotum brown, margined with yellow; pleurae 

 yellow with three brown longitudinal stripes, the upper one somewhat obsolete, 

 the lower one broader than the others and extending over the bases of the coxae. 

 Abdomen brown, posterior margins of the segments and venter yellowish, genitalia 

 large, yellow; tips of the appendages black. Legs yellow; the entire front femora, 

 apex of the middle femora and a subapical band on the posterior femora dark brown; 

 tibiae and bases of the metatarsi whitish, bases and apices of the front and middle 

 tibiae, tips of the posterior tibiae and all of the tarsi including the outer half of the 

 metatarsi dark brown. Halteres yellow the knobs slightly infuscated. Wings hya- 

 line with a slight brownish tinge, stigma brown with a light spot on each side, the 

 costa and costal and subcostal cells white. Length, 4.5 mm. The female differs 

 but little from the male. The front and middle metatarsi are entirely brown; the 

 ovipositor entirely yellow. 



Six specimens. Sport Island, Sacandaga River, N. Y., July 5, 1909, and August 

 24, 1910. Holotype and two paratypes in the author's collection; the others in 

 the collection of the collector, Mr. Charles P. Alexander. 



Leptis gracilis sp. nov. 



Male. Front and occiput blackish, grayish pollinose, with two slight tubercles 

 above the antennae; ocelligerous tubercle black; eyes widely separated; palpi and an- 

 tennae yellow, aristae black. Thorax yellow, with narrow somewhat obsolete 

 stripes due largely to rows of fine black hairs; pleurae and scutellum yellow. Abdo- 

 men slender, yellow, first segment with a black spot below the scutellum, the re- 

 maining segments with broad basal bands of black. Halteres and legs light yellow, 

 a small black dot at the base of the femora on the inner side; tarsi somewhat brown- 

 ish toward the tips. Wings hyaline, veins light brown, anal cell closed, with a 

 short petiole extending to the margin. Length, 6 mm. 



The female differs but little from the male except that the black on the first 

 segment of the abdomen extends entirely across the base. The front is slightly 

 wider and has three slight grooves, the tubercles are obsolete. 



Six specimens Holotype and Allotype. — Amsden, Vt., July 10, 1908 (C. W. John- 

 son). Paratopes.— Mt. Ascutney, Vt., above 2,000 ft., July 11, 1908 (C. W. John- 

 son.) Mt. Greylock, Mass., August 8, 1907 (Owen Bryant). Types in the New 

 England collection of the Boston Society of Natural History. 



