148 REVISTA CHILENA DE HISTORIA NATURAL 
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MODIFIED SEGMENTS.—The eighth tergite of the male is 
strongly rounded-dilated anad, and bears a patch of bristles at 
the apex. At the upper edge of the dilated portion of the tergite 
there is a row of short hairs, while the oblique ventral edge is 
minutely serrate. The eighth sternite is small and gradually 
widened anad, bearing at the apical edge a row of bristles placed 
closely together. Above this sternite there are two pieces of 
chitin, densely clothed with long fine hairs, being brush-like in 
appearance. These ‘brushes represent apparently the ninth 
sternite. The clasper is produced into a somewhat elliptical 
process, which bears at the end two long bristles. The movable 
finger is not longer than this process, but much broader, being 
triangular, with the ventral edge shortest and the hinder edge 
longest. The finger has no long hairs, and is, in optical section, 
dorsal of the process of the clasper. 
The eighth tergite of the female is similar to that of C. insignis, 
but some of the hairs are absent. 
Length 2.1 mm. 
We have received a very large series of this flea from William 
Foster, taken near Sapucay, Paraguay (type), from various hosts- 
Myotis nigricans, M. albescens, etc., etc. Mr. J. A. Wolftsohn, in 
whose honour this species is named, also forwarded us two female 
specimens taken from Vespertilio nigricans at Valparaiso, Chili. 
