292 BULI.F-TIN U6, UNITED STATES jSTATTONAL MUSEUM. 



jinglo of this bond boars a stump; hind margin of wing distinctly 

 indontod at tip of fifth vein; anal angle very prominent. 



Female. — Face wide, white; fore tarsi j)lain, first joint slightly 

 longer than tlio two following taken together, second more tlian half 

 as long as first and about as long as third and fourth taken together, 

 fifth scarcely as long as fourth, last throe joints black, still the base 

 ' of third more or loss yellow; wing as in the male, except that the anal 

 angle is not quite so prominent. 



Redescribed from five males and two females, the males were taken 

 as follows: One at Delaware Water Gap, New Jersey, July 11; two 

 at Lafayette, Indiana, July 4; one at Toronto, Ontario, Juno 13; and 

 one at Fort Erie, Ontario, July 4. 



Type locality. — Illinois. Melander and Brues report it from Wis- 

 consin. 



Aldrich in a note in the Catalogue of North American Diptera gives 

 the color and size of the third joint of fore tarsi as a distinguishing 

 character of this and longipennis. 1 do not find these characters 

 reliable, at least they are not very certain, but the two species are 

 readily separated by the form of the anal angle of the wing, in sarotes 

 the anal angle is very prominent and evenly rounded, the wing being 

 of nearly equal width, while in longipennis it is rather prominent but 

 much narrowed and there are two small lobes one at tip of sixth vein 

 and one at the anal angle; they are also separated by the second joint 

 of fore tarsi being nearly as long as the fii'st in longipennis and 

 scarcely two- thirds as long as first in sarotes. 



No. 215. DOLICHOPUS CUPRINUS Wiedemann. 



Dolichopus cuprinus Wiedemann, Auss. Zw., vol. 2, 1830, p. 230. — Say, Journ. 

 Acad. Sci. Phila., vol. 3, 1823, p. 86, complete works, vol. 2, p. 76 (both 

 cupreus, preoccupied). — ^Loew, Neue Beitr., vol. 8, 1861, p. 20; Mon. N. 

 Amer, Dipt., pt. 2, 1869, p. 55. — Aldrich, Kansas Univ. Quart., vol. 2, 

 1893, p. 12, pi. 1, fig. 7.— Melander and Brues, Biol. Bull., vol. 1, 1900, 

 p. 148. — ^Johnson, Insects of New Jersey, 1909, p. 756. 



Male. — Length 4-6 mm.; of wing 4-5.3 mm. Face wide, only a 

 little narrowed below, silvery white, slightly tinged with yellow 

 above. Front green, sometimes blue, or even dark violet, shining. 

 Antennae yellow; third joint a little longer than wide, pointed at tip, 

 which is sometimes a little infuscated. Lateral and inferior orbital 

 cilia yellowish white, with five or six stout black cilia on each side 

 above. 



Thorax green with bronze and usually'' blue reflections, and witli 

 three coppery vittae on the dorsum, the median one narrow and 

 sharply defined (in one specimen before me the dorsum is deep violet 

 and the vittae are dark green) ; dorsum a little dulled with grayish pol- 

 len ; pleurae with whitish pollen. Abdomen green %vith bronze and cop- 

 pery reflections; the white pollen on its sides abundant and extending 

 upon the dorsum. Hypopygium black; its lamellae of moderate 



