BEBOLUS. 135 



Genus DEROLUS. 



Derolus, Gahan, A. M. N. H. (6) vii p. 26 (1891). 

 Capnocerambyx, Reitter, Ent. Nachr. xx, p. 356 (1894). 



Type, D. mauritanicus, Buquet. 



llanye. Mediterranean Subregiou ; Africa and Oriental Regions. 



Eyes large, emarginate, somewhat closely approximated above, 

 not very widely separated below, extended under the antennal 

 supports in front. Antennae less than twice as long as the body 

 in the c? ; first joint without cicatrix at the apex ; third and fourth 

 slightly nodose at the apex, the fifth to tenth angulate anteriorly 

 at the apex, the fourth distinctly shorter than the third. Pro- 

 thorax transverse ; rounded at the middle of each side, usually 

 more or less wrinkled above, and with a rather deep nitid groove 

 with sharp edges curving downwards on each side behind the 

 middle. Elytra truncate or subtruncate, sometimes rounded, at 

 the apex. Femora with a fine carina on each side near the ventral 

 face. Intercoxal process of prosternum subtruncate or tuberculate 

 posteriorly. Acetabula of front coxae very slightly or not at all 

 ungulate on the outer side, closed posteriorly ; those of the middle 

 coxae narrowly open to the epimera, partly shut off by a small 

 process of the metasternum. 



134. Derolus mauritanicus, Buquet (Hammaticherus), Ann. Soc. Ent. 



Fr. 1840, p. 295. 

 Hammaticherus nerii, Erichs. Wayn. Reiss. in Alyer. iii, p. 188, 



pi. 8, fig. 11 (1841). 

 Cerambyx nerii, Muls. Col Fr. ed. 2, Longic. p. 58 (1862). 



Brownish black, the elytra often more or less distinctly brown ; 

 covered, except on the prothorax, with a fine and not very 

 dense greyish pubescence ; legs and 

 antennae brownish, faintly pubescent. 

 Antennas nearly twice as long as the 

 body in the c? , scarcely longer than it in 

 the $ ; first joint densely rugulose -punc- 

 tate ; third and fourth slightly nodose at 

 the apex, the third twice as long as the 

 fourth and slightly shorter than the fifth. 

 Prothorax somewhat glabrous above, 

 marked with a transverse subsinuate 

 groove near the base and another near 

 the apex, the basal groove continuous at 

 each side with a broader and deeper 

 groove which runs obliquely downwards 

 and then curves forwards past the middle ; 

 Fig. 53. Derolus maurl- the pronotum, where it borders this 

 tanicus, Buq., <$. x |. groove, has a rather sharp and slightly 

 projecting edge ; the disc uneven, slightly 



raised along the middle and along each side and crossed by some 

 undulating ridges which are sharper and more distinct near 



