no. 3626 CULICOIDES — WIRTH AND LEE 5 



In addition to the three Colombian species described below, this 

 group is known to include an undescribed Costa Rican species that 

 closely resembles C. puracensis, new species, in wing pattern, but 

 differs in having the antennal sensorial pattern in, xi-xv, pale rings 

 on each side of the dark knees, and the costa distinctly thickened 

 proximad of the tip of vein Rl. 



Culicoides andicola Wirth and Lee, new species 



Figures la-c; Plate 1 (fig. 1) 



Female. — Length of wing 1.51 (1.30-1.58, n=8) mm. 



Head: Eyes hairy, contiguous, meeting for a distance equal to the 

 diameter of 2 facets. Antenna (fig. la) with lengths of flagellar seg- 

 ments in proportion of 18-13-14-14-15-15-15-16-21-23-25-31-46, 

 antennal ratio 1.17 (1.13-123, n=6); xi-xv all stout to apices; distal 

 sensory tufts present on segments in, xi-xv, sometimes also on vn 

 and ix. Palpal segments (fig. 16) with lengths in proportion of 7-27- 

 26-10-17; third segment slightly swollen distally, 2.69 (2.5-2.9, 

 n=8) times as long as greatest breadth, with a small, round, deep 

 sensory pit. Proboscis moderately long, P/H ratio 1.0; mandible with 

 15 (14-17, n=14) teeth. 



Thorax: Unicolorous dark brown. Legs pale brown, femora darker 

 except distally on midfemur; knee spots dark brown on fore- and 

 hind legs ; tibiae paler proximad ; hind tibial comb with 5 spines, the 

 one nearest the spur longest. 



Wing (pi. 1: fig. 1): Pattern as figured; with large, moderately 

 distinct pale spots; large pale area over basal arculus; large pale area 

 over r-m crossvein broadly extending from costal margin into pale 

 area basally in cell M2; poststigmatic pale spot large and quadrate, 

 covering distal half of second radial cell and touching vein Ml; distal 

 pale spot in cell R5 rounded with faint margins and not meeting wing 

 margin or vein Ml ; small, oval, pale spot in base of cell Ml forming a 

 double spot with distal extension of large pale areas filling cell M2 

 between medial and mediocubital forks; distal pale spot in cell Ml 

 extending proxmad as a sharp point to about middle of cell, the distal 

 side of the spot not meeting wing margin but extending caudad and 

 continuous with the small distal pale spot in cell M2; cell M4 with a 

 large pale spot filling distal half of cell between vein M3+4 and wing 

 margin; anal cell with pale base continuous with pale area over basal 

 arculus, a broad subapical pale band continuous with pale area behind 

 medial fork and extending broadly to posterior wing margin. Mac- 

 ro trichiae very sparse and confined to distal fourth of wing; costa 

 extending to 0.62 (0.59-0.63, n = 8) of distance to wing tip; radial 

 cells of subequal lengths, with distinct lumens, the second much 

 broader. Halter pale. 



