1897.] of the Colcoptcra of South Africa. 105 



large ; all the trochanters elongate ; tarsi with two claws equal in 

 length. 



The general facies is very different from that of Ctenistes ; it is 

 much shorter and thicker, and the shape of the palpi is entirely 

 different. 



The geographical distribution is somewhat peculiar. I first dis- 

 covered two species in Abyssinia (one of which has been also found 

 since in Natal), another one inhabits West Africa (Gold Coast), a 

 fourth one occurs in Zanzil)ar, but the genus is also met with in 

 Sumatra and Borneo. 



Odontalgus vespertinus, Eaffr., 

 Eev. and Mag. Zool., 1877, p. 9. 



Short, thick, chestnut brown or piceous, body covered with greyish 

 squamae, palpi and tarsi rufo-testaceous, foveae and sutures filled 

 with glandular whitish squamae; head depressed, strongly trifo- 

 veate, antennal tubercle shghtly sulcate ; antennae rather thick, first 

 joint large, subelongate, second larger than the following ones, sub- 

 cylindrical, third shghtly obconical, equal in length to the preceding 

 one but more slender, fourth to seventh shorter and decreasing a 

 httle in length, eighth minute, very transverse, the other differing in 

 each sex ; prothorax shghtly conical, sinuate laterally, with several 

 impressions and having four tubercles arranged in the shape of a 

 cross, the three anterior ones are the largest and oblong, the posterior 

 one is very much smaller and rounded ; elytra broader than the 

 prothorax, subquadrate with the sides shghtly rounded and ampliate 

 beyond the median part, hardly attenuate at base, shoulders oblique, 

 well developed, base bifoveate and broadly although obtusely tri- 

 carinate lengthways (suture included) ; abdomen abrupt behind, first 

 dorsal segment a little larger than the others, and the basal three 

 slightly and bluntly carinate in the middle of the apical part ; anterior 

 trochanters tuberculate at tip. 



Male : Antennal club triarticulate, ninth joint subquadrate with 

 the angles rounded, tenth similar but a little larger, eleventh broader 

 and more than twice the length of the preceding one, subcyhndrical, 

 rounded at tip ; metasternuni very deeply excavate all over, bottom 

 of excavation foveate in the anterior part, sulcate in the posterior and 

 fiUed with glandulose squamas, sides with an erect dentiform tubercle 

 before the median part ; whole of abdomen deeply concave under- 

 neath, second segment foveate in the middle, apical one dentate on 

 each side ; last dorsal segment obtusely carinate in the middle and 

 slightly impressed on each side. 



Female : Club of antennae biarticulate, ninth joint hardly larger 



