BITING MIDGES — WIRTH AND BLANTON 321 



tending its full breadth from wing margin to posterior side of vein 

 M3+4; two well separated round pale spots in distal part of anal cell 

 and a third near hind wing margin at base of cell; cell M2 with small 

 pale spot lying in front of mediocubital fork and one lying behind 

 medial fork; pale spot present straddling middle of stem of medio- 

 cubitus. Macrotrichia long and numerous, extending to base of wing 

 in cell M2 and anal cell; costa extending to 0.62 (0.59-0.64, n = 5) of 

 distance to wing tip. Halter pale. 



Abdomen. — Dark brown. Spermathecae two, slightly unequal; 

 pyriform, measuring 0.058 by 0.046 and 0.050 by 0.038 mm., the bases 

 of the ducts sclerotized a short distance. 



Male genitalia: Ninth sternum with very shallow, broad, cau- 

 domedian excavation; ninth tergum tapering with large, triangular, 

 apicolateral processes. Basistyle with very small, pointed, ventral 

 root; dorsal root longer and slender; dististyle slender and slightly 

 curved, with bent, pointed tip. Aedeagus with basal arch extending 

 to about three-fourths of total length of aedeagus, the basal arms 

 slender and nearly straight; distal portion short and slender with 

 simple tip. Parameres each with large basal knob bearing a long 

 anterior process; stem slender and gently curved at base, nearly 

 straight and slightly swollen in midportion, distal portion gradually 

 narrowed to slender twisted tip. 



Distribution: Mexico; Venezuela; Panama; Honduras (Lancetilla) . 



Panama records: 

 BocAS DEL ToRo PROVINCE: Almirante. 



Discussion: This species is closely related to crescentis, new species, 

 and antefurcatus, new species, but can easily be separated from the 

 first by the lack of the small pale spot lying in front of vein Mi and 

 from the second by the location of the distal pale spot in cell Mi far 

 from the wing margin. The wing pattern of daedalus is closest to that 

 of daedaloides, but in daedaloides the distal pale spots in the anal cell 

 are fused, there is a subapical pale ring on the hind femur and the wing 

 is only sparsely hairy. 



23. Culicoides commatis, new species 



Figure 26 



Female: Length of wing 1.02 mm. 



Head. — Eyes narrowly separated, bare. Antenna with flagellar 

 segments in proportion of 1 6 : 12 : 14 : 13 : 15 : 14 : 14 : 1 5 : 28 : 27 : 29 : 29 : 42, 

 antennal ratio 1.19; distal sensory tufts present on segments iii, v, 

 VII, IX, xi-xv. Palpal segments in proportion of 12:21:26:9:8, 

 third segment markedly swollen, 1.53 times as long as greatest breadth, 

 with very large, deep sensory pit. Mandible with 12 teeth. 



