ERNEST E. AUSTE]^— DIPTERA. 87 



Peoagonistes pr^do, sp. n. (Plate III. fig. 2.) 



c? . — Length (1 specimen) 27 mm.; width of head 6-2 mm.; width of front at 

 vertex 1'6 mm. ; length of wing 24 mm. 



Black ; dorsum of thorax in type chiefly dull, scutellum and dorsum of abdomen 

 moderately shining and purplish-black ; dorsum of thorax with a ferruginous* stripe 

 along each side, including humeral callus and extending beyond suture ; wings dark 

 brown with a purplish tinge, central portion of second, third, fourth, and fifth posterior 

 cells, and of axillary cell, and upper margin of second basal cell paler ; upper surface 

 of front and middle femora and distal third [below not more than distal fourth) of 

 hind femora black, under side of front and middle femora and proximal two-thirds or 

 three-fourths of hind femora burnt-sievna coloured ; tibice orange-rifous, tarsi, esjjecially 

 front pair, somewhat darker, hind tibice with a dark broton spot above at extreme tips, 

 last three joints of front and middle tarsi each ivith a small black spot beloio. 



Head shining black, with a roughly semicircular ferruginous spot on each side of 

 the prominent facial tubercle, which bears a conspicuous tuft of long and coarse 

 orange-rufous hair ; front, sides of face, and occipital region clothed with similarly 

 coloured hair, beard yellowish white ; anterior ocellus in case of type small but 

 distinct; first and second joints of antennae orange-rufous, clothed with similarly 

 coloured hair and bristles, second joint also with some black hairs, third joint mummy- 

 brown, elongate ovate when viewed from the side ; palpi shining black, clothed at tips 

 with orange-rufous hair ; tip of proboscis clothed above with chrome-yellow hair. 

 Thorax : hairs and bristles on dorsum and scutellum black, lateral ferruginous stripes 

 clothed with orange-rufous hair, the long bristles on the posterior two-thirds of each 

 stripe also orange-rufous ; pleurse clothed mainly with black hairs, but with a few 

 yellowish-white hairs above each coxa. Abdomen clothed above with short black 

 hairs, on sides and below with longer black hair; genitalia burnt-sienna coloured, 

 clothed at tips with orange-bufi" hair. Wings: second submarginal cell commencing 

 just beyond level of end of discal cell, long, and its proximal two-thirds narrow. 

 Halteres ochraceous-buff. Legs : front and middle coxse clothed with yellowish-white, 

 hind coxse with black hairs ; front and middle femora clothed above with black hairs, 

 below and on each side with long and fine hairs, tending to curl at tips, and for most 

 part yellowish on basal, black on distal half of femora ; tips of middle and hind femora 

 above and of front femora on each side clothed with orange-rufous hair; spines or stout 

 bristles towards tips of middle and hind femora ferruginous; hind femora clothed 

 mainly with black hair, long and fine on sides and below; hair on tibiee and tarsi 

 ochraceous, spines ferruginous ; first joint of hind tarsi long and not incrassate ; basal 

 half or basal third of claws ferruginous, remainder black. 



Hab. Mubuku Valley, E. Euwenzori, 6000-7000 ft., 5th Feb. 



* For names and illustrations of colours, see Eidgway, ' A Nomenclature of Colors for Naturalists ' 

 (Boston : Little, Brown, & Company, 18S6). 



