6 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
onto the surface. Details of the Mallophaga were added after the 
microscope was uprighted. 
Measurements for the tables are in millimeters and were made with 
the aid of an ocular micrometer. 
Because of variation in setal number, setae recorded in species 
descriptions represent the range in numbers of setae from repre- 
sentative specimens from the material examined. 
Characters described under genera or species-groups have not been 
repeated for individual specific descriptions. In each genus or species- 
group the arrangement of the species is based first on morphological 
similarity and second on the phylogenetic arrangement of their hosts. 
Key to Species of Chapinia, Bucerocolpocephalum and Bucerophagus 
1. Terminal segment of antenna showing definite signs of division either by 
transverse line or marginal indentation (figs. 64a, 66a, 68a). . . . . 19 
Terminal segment of antenna without signs of division (figs. 23a, 25a). 
(Genus Chapinia Ewing). . . 2 
2. Dorsal-lateral margins of head with a preocular slit (figs. 23, 24). 
(lophocerus species-group) . . . 3 
Dorsal-lateral margins of head with a preocular notch (figs. 25, 26). . . . 7 
3. Each lateral margin of abdominal tergites III-VI with a short seta between 
the spiracle and postspiracular seta (fig.64]l).... cy fy po Rope pontine 
Abdominal tergites without such short setae (figs. 23, 24). 
C. robusta Ewing, p. 17. 
4. Abdominal sternite II with three median rows of setae. 
C. bucerotis (Kellogg), p. 15. 
Abdominal sternite II with one median row of setae on posterior margin . 5 
5. Male genitalia with each lateral horn possessing two sharp posterior points; 
female anal fringe with fewer than 58 setae (figs. 2, 28). 
C. lophocerus (Bedford), p. 13. 
Male genitalia with each lateral horn possessing one or two rounded posterior 
points; female anal fringe with more than 58 setae... . AG: REREG 
6. Male genitalia with each lateral horn possessing two rounded posterior 
points; female anal fringe with more than 70 setae (fig. 1). 
C. fasciati, new species, p. 12. 
Male genitalia with each lateral horn possessing one rounded posterior point ; 
female anal fringe with 60—64 setae (fig. 3) . C. camuri, new species, p. 15. 
7. Each lateral margin of abdominal tergites III-VI with a short seta between 
the spiracle and postspiracular seta (fig.641).......... 8 
Abdominal tergites without such short setae... . ee ge ot 
8. Male genitalia with endomeres possessing small inner ales eng paired outer 
rims, each with serrulations on posterior inner margin; female with each 
lateral projection of ventral sclerite between vulva and anus possessing 
more than eight thick, posteriorly directed setae (figs. 71, 72sp). 
C. waniti, new species, p. 22. 
Male genitalia with endomeres possessing small or large inner plate and paired 
outer rims without serrulations; female with each lateral projection of 
ventral sclerite between vulva and anus possessing fewer than eight thick, 
posteriorly “directed setae’ (ig. /43sp) 2°72. 4%. a) ee ee 
