8 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
18. Sclerite of male genital sac large, nearly twice as long as wide; female un- 
known (fig. 18s)... ... . . . C, muesebecki, new species, p. 34. 
Sclerite of male genital sac small, about as wide as long; female terminal 
abdominal tergite with 5 long setae on posterior margin each side of mid- 
line, these 10 setae being evenly spaced (figs. 19s, 48). 
C. hirta (Rudow), p. 35. 
19. Venter of third femora and posterolateral margins of fourth abdominal 
sternite each with three full rows of combs (figs. 64, 65). 
(Genus Bucerocolpocephalum, new genus). . a 
Venter of third femora and fourth abdominal sternite without combs. 
(Genus Bucerophagus Bedford). . . 21 
20. Male genitalia with endomeres having a pair of posterior points; female 
abdominal sternite VIII with internal triangular sclerite (figs. 49, 57). 
Bucerocolpocephalum emersoni, new species, p. 37. 
Male genitalia with endomeres lacking a pair of posterior points; female 
abdominal sternite VIII without internal sclerite (figs. 50, 58). 
Bucerocolpocephalum deignani, new species, p. 38. 
21. Venter of third femora and posterolateral margins of abdominal sternites 
IV and V, each with brushes of normal setae (figs. 68, 69). . . .. . 22 
Venter of third femora and abdominal sternites IV and V without brushes 
Gigs) 66,067) \<\ coc: ta," . . « Bucerophagus forcipatus (Nitzsch), p. 42. 
22. Metasternal plate eens expanded anteriorly (fig. 70). 
Bucerophagus productus (Burmeister), p. 44. 
Metasternal plate trapezoidal, expanded anteriorly (fig. 68c). 
Bucerophagus africanus Bedford, p. 46. 
Genus Chapinia Ewing 
Figures 23-26 
Chapinia Ewing, 1927, p. 88. [Genotype: Chapinia robusta Ewing, 1927.] 
Allomenopon Bedford, 1930, p. 153. [Genotype: Menopon bucerotis Kellogg, 
1908.] 
Head triangular, width 1% to 2 times that of length. Forehead 
much narrower anteriorly. Temples expanded. Antennae 4-jointed, 
third segment constricted at base, and terminal segment capitate 
without signs of division. Antennary fossa deep, covered above by 
expansion of lateral margin of head, posterior margin of which bears 
eye with double cornea. Dorsal-lateral margin of forehead anterior 
to eye with preocular slit or shallow notch. Gular region with 3-7 
setae varying in length on each lateral margin. Pronotum expanded 
anteriorly with posterior marginal row of long setae. Metanotum 
expanded posteriorly with posterior marginal row of long setae and 
two short setae on each lateral margin. Metanotum separated from 
mesonotum and from pleurites. Thoracic sternal plates as shown in 
figures 23b, 25b, and 26c. Metasternal plate trapezoidal, expanded 
anteriorly, with 6-22 setae. Venter of third femora and posterolateral 
margins of abdominal sternites IV-VI, each with or without brushes 
of normal setae. Abdominal segments consist of tergites, sternites, 
and pleurites, the latter without prolongation of posteroventral angles. 
