556 Transactions Sontli African Philosojjliical Society, [vol. xii. 



deeply impressed; palpi and maxillae as in Syrichthodontus ; the 

 head and the prothorax are similar, the latter having in the male 

 only a deep median longitudinal groove, reaching from apex to base ; 

 the elytra are depressed and a little amphate past the middle, and 

 on the propygidium there are two median vertical, narrow, finely 

 striate bands; the pygidium, legs, and tarsi as in Syrichthodontus. 

 This genus is really distinguished from Syrichthodontus mainly by 

 the shape of the mentum and of the stridulating organs, but the 

 facies is very different. 



PSEUDOSYKICHTHUS CLATHRATUS, Gerst., 



Plate XL., fig. ^.>7. 



Beitr. Ins. Zanz., 1866, p. 40 ; Glied. Faun. Sans. Geb., 1873, p. 105, 



pi. vi., fig. 7. 



Male : Black, moderately shining, glabrous above, but with the 

 outer margin of the prothorax and of the elytra from the base 

 to past the middle fringed with moderately long, dense fulvous 

 hairs ; head strongly scrobiculate, and having in the centre a short, 

 but sharp conical tubercle ; prothorax slightly retuse near the 

 anterior margin, where there is a small, median tubercle, hardly 

 convex, deeply grooved from near the anterior tubercle to the base, 

 and covered with very dense, round, foveate punctures, closely set 

 but not coalescing; scutellum nearly smooth ; elytra with ten series 

 of deep, clathrate foveas, the intervals of which are costate and 

 somewhat sharp, the foveas are occasionally filled with earth, the 

 suture is a little raised ; pygidium covered with closely set foveate 

 punctures, propygidium clothed, except on the stridulating organs, 

 with a short, dense flavescent pubescence ; under side densely hairy. 



Female unknown. 



The habits of this species are different from those of Syrichtho- 

 dontus, as evidenced by the foveas on the elytra being filled with 

 earth occasionally, and thus implying a subterraneous mode of life 

 in the early stage. 



Length 20-22 mm. ; width 9^-10^ mm. 



Hah. Southern Rhodesia (Salisbury, Victoria Falls, Manica). 

 It was first recorded from Lake Jipe, in British East Africa. 



VENEDUS, n. gen. 



I have not been able to dissect Boheman's co-type of Hcteronychus 

 paradoxus, which was only lent to me for the purpose of identifi- 



