BITING MIDGES — WIRTH AND BLANTON 453 



scutellum and pleuron dark brown. Legs dark brown, femora without 

 pale rings, fore and mid tibiae with basal, and hind tibai with basal 

 and apical, narrow pale rings; hind tibial comb with four (n = 9) 

 spines, tlie one nearest the spur longest. 



Wing.— Pattern as figured; second radial cell remarkably broadened, 

 the three pale spots in cell R5 arranged in a large triangle, distal spot 

 in cell R5 transverse, only one distal spot in cell Mo, pale spots present 

 behind medial fork and in front of mediocubital fork, a single pale 

 spot in apex of anal cell transverse, extending nearly to wing margin. 

 Macrotrichia sparse on distal half of wing, a few at base of medial 

 cell and in anal cell; costa extending to 0.68 of distance to wing tip. 

 Halter brown, the end of the knob slightly paler. 



Abdomen. — Blackish, cerci yellowish. Spermathecae two, pyriform, 

 subequal, measuring 0.063 by 0.048 mm. and 0.059 by 0.042 mm. 



Male genitalia: Ninth sternum with very shallow caudomedian 

 excavation; ninth tergum long and tapering, the apicolateral processes 

 large, triangular. Basistyde with ventral root foot-shaped, the 

 posterior heel long; dorsal root short; dististyle long and slender, 

 with bent, pointed apex. Aedeagus with short, rounded anterior 

 arch, posterior portion in three parts; a median stem-Hke lobe with 

 prominently bifurcate apex, and a pair of slender, tapering, pointed 

 lateral lobes about half as long as median one. Parameres stout, 

 each with large basal knob, stout stem gradually expanded to a large, 

 ventral, subapical lobe, beyond which it is greatly narrowed, twisted 

 laterad, ventrad, and then mesad, the distal point flattened with 

 four subapical barbs. 



Distribution: British Guiana; Honduras (Lancetilla); Panama. 

 Panama records: 



BocAS DEL ToRO PROVINCE: Almirante. 



Canal Zone: Camp Pina, Fort Davis, Loma Boracho, Mojinga Swamp. 



Panama Province: Goofy Lake, Pacora. 



Discussion: Through the courtesy of Paul Freeman and the 

 trustees of the British Museum (Natural History) we have examined 

 a slide labeled in Macfie's handwriting "Culicoides / debilipalpis 

 Lz. / V. glabrior / 9 (large specimen) / C. germanus / 9," but not bearing 

 locality or other data. According to Mr. Freeman these are the 

 presumed types of glabrior and germanus, each of which Macfie 

 described from single females from British Guiana. The type of 

 glabrior agrees in all details very closely with our Panama series. 

 Culicoides glabrior can readily be distinguished from all related 

 species by the remarkable breadth of the second radial cell. The 

 unhanded femora are also distinctive. 



This species seems to occupy an intermediate position between the 

 fluvialis and debilipalpis groups and its true relations are doubtful. 



