PACliYDISSUS. 



133 



joint with a narrow cicatrix at the apex limited by a short trans- 

 verse carina. Elytra truncate at the apex. Femora finely 

 carinate along each* side close to the ventral border. Intercoxal 

 process of the presternum subtruncate posteriorly. 



132. Diorthus simplex, White (Hammaticherus), Cat. Col. B. M., 

 iow/u'. p. 130(1853). _ -,. , .^ 



Cerambyx liolosericeus, Oliv. {)>ec Fiih.) Ent. iv, no. 67, p. 14, pi. 17, 

 fig-. 127 (1795). 



Cerambyx vernicosus, Pnscoe, Trans. Ent. Soc. (2) v, p. 19 (1859). 



Pachydissus inclemens. Thorns. Syst. Ceramh. p. 576 (1865). 



Neocerambyx sordidus, Pascoe, trans. Ent. Soc. 1888, p. 491. 



Varies in colour from black to reddish brown, not very 

 densely covered with short pubescence of a 

 greyish or brownish-grey tint. Head with 

 a median impressed line or groove above, 

 between the eyes. Antennae not quite so 

 long as the body in the $ , and from one and 

 a half times to nearly twice as long as the body 

 in the 6 , fringed with short delicate grey 

 hairs beneath ; third and fonrth joints nodose 

 at the apex, the third nuich longer than the 

 fourth ; fifth to tenth compressed and angu- 

 lated anteriorly at the apex. Prothorax 

 rounded at the sides, somewhat constricted 

 in front, irregularly and not very strongly 

 wrinkled above in a general tr?rsverse 

 direction, marked on the disc with some 

 feeble longitudinal and oblique grooves 

 which together form a somewhat crown- 

 shaped impression. Elytra truncate at the 

 apex, with a short spine from each at the 

 sutural angle ; the pubescence covering them 



more or less glossy, and generally somewhat thinner on each side 



in front of the middle so that the colour of the underlying derm 



becomes more apparent there. 



Length 16-29; breadth 4;|-8 mm. 



Hai). Baluchistan : Ormarah ( W. D. Gumming) ; Karachi {F. W. 



Townsend) ; Bengal ; jNl adras ; Ceylon ; North Burma ; Siam ; Java ; 



Aden ; Mauritius ; West Africa. 



Genus PACHYDISSUS. 



Pachydissus, Neivman, Entom. Mar/, v, p. 494 (1838) ; Lacord. Gen 

 Coleopt. viii, p. 265 (1869). 



Type, P. sericiis, Newm., an Austi-alian species. 



Eange. This genus, as now restricted, is almost confined to the 

 Australian Eegion ; one or tw^o species belong to the Oriental and 

 a few also to the African Eegion. 



Head with a more or less distinct groove above between the 

 eyes ; the antennal supports narrowly separated ; the front sub- 



Fig. .51. 

 Diorthus simplex. 

 White, d". X |. 



