AQUATIC INSECTS IN THE ADIRONDACKS 585 



its lower margin strongly oblique and straight, and its apex broadly- 

 rounded ; the veins and stigma black, the costa pale at base. Length, 

 7 mm. Habitat, Saranac Inn N. Y. 



Taxonus innominatus sp. nov, 

 $ Black, with the following parts rufous: the labrum, the apical half 

 of the mandibles, the femora, the tibia, the front tarsi, the apex of the 

 second, and the entire third and fourth abdominal segments ; the tegulae, 

 the apices of the front and middle coxae, and trochanters lutescent ; 

 theclypeus deeply roundly emarginate; the third segment of the antennae 

 longer than the fourth; wing veins blackish. Length, 8 mm. Habitat, 

 Saranac Inn N. Y. 



ORIGINAL DESCRIPTIONS OF NEW DIPTERA 



BY D. W. COQUILLETT, U. S. NATIONAL MUSEUM, WASHINGTON D. C. 



ZABRACHiA, geu. nov. Stratiomyiidae 

 Closely related to Pachygaster, differing chiefly in the shortened, 

 simple third vein. Head in profile only slightly higher than long; face 

 and lower part of the front almost perpendicular ; eyes nearly orbicular ; 

 antennae shorter than the head, the complex third joint transversely el- 

 liptic, the apical, slender style slightly longer than remainder of antennae; 

 third vein of wings simple, terminating at about one third of the length of 

 the second vein beyond the apex of the latter; four posterior cells, a part 

 of each of them bordering on the discal cell. Type, the following 

 species. 



Zabrachia polita sp. nov. 



Black, polished, the antennae except the styles, also the tibiae, tarsi and 

 apices of femora, yellow, knobs of halteres white, each marked with a 

 black spot on basal half of the upper side ; wings hyaline, stigma pale 

 yellowish; length, 2.5 mm. Two females, collected Aug. 8, 1900, by 

 Prof. James G. Needham. 



Type. Cat. no. 5344, U. S. national museum 



Habitat. Saranac Inn N. Y. 



ROEDERiODES, gen. nov. Empididae 

 Closely related to C 1 i n o c e r a. .Face bare, not separated from the 

 cheeks by a groove ; cheeks two thirds as broad as the eye hight ; pro- 

 boscis nearly as long as hight of head, rigid, the labella not developed ; 

 third joint of antennae oval, pointed at the apex, the apical style about 

 as long as remainder of antennae; no acrostichal bristles, scutellum 

 bearing bristly hairs in addition to the two marginal bristles ; wings 

 destitute of a brown stigmal spot, third vein forked, discal cell complete, 

 sending two veins to the wing margin, of which the upper vein is forked, 



