BITING MIDGES — WIRTH AND BLANTON 



417 



TSUKAM°'^° 



Figure 67. — Culicoides castillae Fox. a-e, Female: a, wing; b, thoracic pattern; c, palpus; 

 d, tibial comb; e, spermatheca. /, g, Male:/, parameres; g, genitalia, parameres removed. 



Abdomen. — Dull brownish black. Spermatheca one, pyriform, the 

 base of the duct sclerotized, spermathica measuring 0.052 by 0.037 

 mm. 



Male genitalia: Ninth sternum with shallow caudomedian ex- 

 cavation; ninth tergum tapering, with short, pointed, apicolateral 

 processes. Basistyle with ventral root foot-shaped with a distinct 

 posterior heel; dististyle slender and slightly curved to pointed apex. 

 Aedeagus with basal arch extending to two-thirds of total length, 

 basal arms curved and slender, posterior stem slender and pointed, 

 with a pair of subapical projections arising on sides at juncture with 

 the arch. Parameres each with knobbed base, stem slightly swollen 

 and distinctly bent at midlength, with a small ventral lobe and apex 

 pointed with a fringe of fine barbs. 



