304 



of glaber and four of decipiens, should render the identifi- 

 cation of the males easy: — 



Glaber. Decipiens. 



Hind tibiae notched near Hind tibise not notched near 

 apex, (26) the apex itself with a apex, and apex not con- 

 strong inner spur. spicuously spurred. 



Basal segment of abdomen Basal segment rather feebly 



conspicuously depressed along depressed, 

 middle. 



Distance between tubercles Distance between tubercles 



more than length of second less than length of second 



segment in middle. segment. 



Dividing line between front Dividing line less than half 



coxa? more than half the dis- that distance, 

 tance between middle coxse. 



The females may also be distinguished by those of glaber 

 being larger, abdomen less convex, and front coxae more 

 widely separated. 



Mandalotus punctiventris, Blackb. 

 There are five co-types of this species in the Museum, 

 only one of which, however, is a male. This specimen has, 

 at the apex of the basal segment of abdomen, a curved shining 

 line that appears to abruptly mark the apex of a semicircular 

 space, but the curved line is not elevated above the space 

 anterior to itself, so it cannot be regarded as a carina ; nor 

 does it encroach upon the second segment as in v entrails. 

 Its middle tibiae are armed with a distinct median tooth, and 

 some smaller ones; the teeth are of a different character to 

 those of fergusoni, and the elytra are very different to those 

 of that species. The female, in general appearance, is very 

 close to some females of ventralis, but has a much thinner 

 scape and longer elytral setae. 



Mandalotus advenus, Blackb. 

 There are two co-types (sexes) of this species in the 

 Museum. The male has the basal abdominal segment carin- 

 ated at the apex, the carina being rather short and straight. 

 Some years ago the late Rev. T. Blackburn, in answer to an 

 enquiry, wrote of this species: "Would fall in your table 

 beside bryophagus. Its front coxae undoubtedly touch each 

 other. I suppose advenus differs from bryophagus by, inter 

 alia, hind tibiae angularly dilated within." It seems to me, 

 however, that the front coxae do not quite touch each other, 

 and the speices therefore would be associated in my former 



(26) Not visible from certain directions, but very distinct from 

 others; when clearly visible the tibise at the notch appear to be 

 suddenly and strongly narrowed, with the apical spur overhanging 

 the notch. 



