340 



PSYCHE. 



[May 1S90. 



with the pleurae, their tips onlv yellow; the 

 median pair fringed, like the fore pair, with 

 black setae. Legs yellow; fore tibiae pro- 

 vided with a few prominent black setae; 

 tarsi i-i times as long as the tibiae ; first and 

 second joints attenuated, stalk-like, both 

 together equalling the tibiae in length ; sec- 

 ond joint thinner than the first and about | 

 as long; third and fourth joints of about equal 

 length, both together about half as long as 

 the second joint. The fourth joint, which is 

 yellow at its extreme base, but otherwise 

 black, is broader than the third joint ; fifth 

 joint flattened out into a large oval blaOk 

 disk, densely fringed on its anterior edge 

 with short black hairs and provided with a 

 small and inconspicuous tuft of silvery hairs 

 near the insertion of the claws. Median 

 femur with a preapical bristle; tibia with 

 rather prominent black spines; tarsus plain, 

 blackened from the tip of the first joint. 

 Hind femora eciliate, with preapical bristle; 

 hind tibiae distinctly inciassated ; apical half 

 black; setae prominent; a rather dense cov- 

 ering of shorter black hairs, especially on the 

 inner face, which presents a smooth streak 

 longitudinally coextensive with the black 

 coloring; hind tarsi black, metatarsal joint a 

 little thickened ; its extreme base yellow. 

 Halteres yellow. Wings more brownish than 

 grayish hyaline; veins dark brown; costa 

 slightly thickened where it meets the first 

 longitudinal vein ; fourth vein presenting 

 the usual double flexure ; posterior cross- 

 vein meeting the fifth longitudinal vein at 

 right angles. 



Habitat: Milwaukee Co., Wis. 



This species is related to several 

 North American dolichopodes. In gen- 

 eral appearance it approaches D. ba- 

 tlllifer., Loew, from which it may, 

 however, be very readily distinguished 

 by the color of the antennae, tegular 

 cilia and hind femora. The dilated 

 fifth tai-sal joint of the fore foot is in my 



species deep velvety black, whereas in 

 batllHfer it is more brownish and cov- 

 ered with minute silky hairs which 

 make it resemble a silver reflector when 

 viewed from the proper angle. 



In the color of its hind tarsi D. pal- 

 aestricus., Loew, approaches ftagcUi- 

 tenens more closely than does batillifer. 

 Loew's species, however, has entirely 

 black antennae, pale tegular cilia and 

 entirely yellow hind tibiae. Both batil- 

 lifer and palaestricus have the hind 

 femora ciliated, the former more abun- 

 dantly, the latter less so, while the 

 hind femora oijlagellitenens are eciliatg. 



DOLICHOPUS HENSHAWI, n. Sp. $ . 



Length 5 — 5.5 mm. ; Length of wing 5 — 

 5.5mm. 



Metallic green, changing to coppery and 

 violet. Palpi pale, blackened at their ends. 

 Face rather narrow, overlaid with ochre-yel- 

 low dust. Antennae small, reddish yellow; 

 basal joint smooth on its under surface, the 

 black hairs on its upper surface, as also those 

 ■ on the second joint, stiflf and rather conspic- 

 uous; third joint small, smooth, not much 

 flattened, ending in a short, acute point; api- 

 cal half black; arista robust. Front metallic 

 violet, moderately shining ; cilia of the supe- 

 rior orbit black, those of the inferior orbit yel- 

 low. Thoracic dorsum resplendent coppery 

 green, passing into violet on the scutellum ; 

 pleurae metallic green, subdued by a layer of 

 silver gray dust. Cilia of the tegulae black. 

 Abdomen with resplendent cupreous reflection 

 especially in the median dorsal line; hypopy- 

 gium black with dull metallic green base, and 

 pale yellow lamellae and internal appendages ; 

 the former are quite large and shaped like isos- 

 celes triangles with rounded angles ; the two 

 sides forming tha apical angle by which the 

 lamella is attached are not infuscated though 

 fringed with a few short and weak yellow 

 hairs; the two other angles are narrowly 



