100 Mr. G. J. Arrow on the 



ooramonest of the species mentioned by him, H. claudius, 

 Kill*;, which, in my opinion, is the earlier described H. meles, 

 Billb. A small, but peculiar, feature of this species is 

 ■n-orthy of meution. Tiie sexes of the Dynastiiije (and 

 Rutelinse) are almost invariably distinguishable by the form 

 of the last ventral segment, which in the female is longer 

 and more pointed behind than in the male. In the latter 

 the apical part appears to be excised and replaced by a 

 shining quasi-transparent membrane. In the male of 

 Hder aligns meles this segment is narrow and the terminal 

 membrane is broad and conspicuous. In the female, con- 

 trary to the usual condition, there is also an apical excision 

 and membranous filling, but the excision is much narrower 

 than in the male and its form is very curious, a bilobed 

 process from the middle of its edge dividing it into two 

 parts, which are fringed with stiff hairs. 



This species is common in Sierra Leone and Nigeria, and 

 extends eastwards as far as Uganda. Mr. Peringuey has 

 described under its name (H. claudius, King) a form from 

 Damaraland, but, as shown by the figure of its oedeagus, that 

 is another species. It appears to be different from H. brevis 

 and geotrupinus of Quedenfeldt, both of which are con- 

 siderably smaller. It must therefore be renamed, and I 

 propose to call it H. peringueyi. 



The following is very closely related, but again distinct : — 



Heteroligus gazanus, sp. n. 



Piceus, subtus parce rufo-hirtus, ovatus, crassiis, capite omnino 

 ruguloso, tuberciilis duo frontalibus distantibus, clypeo modice 

 angustato, antice arcuato, prothorace undique crebre punctato, 

 disco subiilius, tuberculis duo gemiuatis paulo ante marginem 

 aiiticum ; scutello paiilo irregu^ariter punctulato ; elytris crebre 

 irregulariter punctatis, lineisquatuor indistinctis diiplicis striaque 

 suturali profinida, propygidio parum subtilit«r transverse striato, 

 pygidio parce sublilissime punctulato, angulis anticis crebre 

 rugulosis : 

 cJ, segmcnto ultimo ventrali brevi, late membranaceo : 



$ , segmento ultimo ventrali longiori, apice auguste et simplico 

 emargi.jato. 



Long. 32-35 mm. ; lat. max. 19 ram. 



Hah. Gazai.and : Chiriuda. 



A pair has been presented by Mr. G. A. K. Marshall. This 

 species has the closest possible resemblance to H. meles, 

 from which the sexual characters referred to distinguish it 

 most surely. The elytra are rather more coaiscly and 

 irre""ularly punctured and the smooth longitudinal lines 



