18 Mr. E. E. Austen on new 



cannot he confused with any other of its congeners at 

 present known. 



Genus Chrysops, Meigen. 

 Chrijsops apruxjna, sp. n. 



p. — Length (4 specimens) 7'25 to 8-75 mm.; width of 

 head 2*4 to 2*8 mm. ; width of front at vertex 0-75 to 

 0-8 mm. ; length of antennse 2-2 to 2-4 mm. ; length of wing 

 7 to I'Q mm. 



Upper surface of thorax and abdomen blaclish slate-colowetl. 

 — Antennce entirelij black, rather short, first joint sornervhat 

 swollen at base ; frontal callus sinning black ; dursnm of thorax 

 with a pair of narrow, light grey, longitudinal stripes ; dorsum 

 of abdomen on each side of first and second segments loith a 

 dull greyish cinnamon-coloured 'patch, more or less indistinct ; 

 hind borders of second and following abdominal segments on 

 dorsal side yellowish-grey pollinose, in each case expanded in 

 middle line into a more or less distinct triangle, seventh segment 

 v;holly grey pollinose; wings hyaline, first and second costal 

 cells raw-sienna-coloured, extreme base, a conspicuous trans- 

 verse band across middle {sharply defined except at posterior 

 extremity), and a narrow border next cost a at distal extremity 

 of wing dark brown ; middle and hind tibite, and first joint of 

 middle and hind tarsi except extreme tips tawny. 



Head ochre-yellow pollinose (in ruhbed specimens front 

 and upper portion of posterior orbits yellowish-grey pollinose), 

 frontal callus, quadrate yrtc/o/ tubercles (connected below by a 

 median prolongation extending to margin of buccal cavity), 

 and a spot below each eye shining black ; ocellar spot greyish 

 clove-brown ; occiput slate-grey, except ])ostcrior orbits and 

 a downward ofl'shoot from latter on each side of occipital 

 triangular extension of ocellar spot; frontal callus narrowly 

 separated from eye on each side, its lower margin curved, its 

 upper margin produced in middle line into an angle, which 

 nearly reaches ocellar spot ; face, jowls, and basioccipital 

 region, except on shining black calli and spots, clothed with 

 pale yellow or yellowish hair ; pollinose portions of front 

 clothed with similarly coloured hair (in some specimens 

 between frontal callus and ocellar spot with dark brown or 

 blackish hair) ; palpi greyish clove-brown, clotlied on outer 

 side and below Mith yellowish, pale yellow, or whitish hairs, 

 terminal joint bluntly lanceolate in outline when head is 

 viewed in profile; first and second joints of antcnme some- 

 what greyish pollinose, clothed with .short, blai-k hair. Eyv- 

 innrkings (as seen in six ^ speeinuMis preserved in sjurit) : 



