BY AKTIIUR M. LEA. 



623. 



Orthorrhinus cylindrirostris, Fab.; Mast. Cat. Sp. No. 5105. 

 — This is an extremely vai-iable species as regards size, colour and 

 clothing, and of which there are numbers of local varieties. 

 Tj'pical specimens have a fascicle (easily abraded) on each side of 

 prothorax at apex; each elytron has two fasciculate tubercles on 

 2nd interstice, of which the larger is near the middle and the 

 smaller close to base ; the 5th interstice has a similar fascicle 

 (preapical callus of Pascoe) on the posterior declivity. The pre- 

 apical callus is variable both in itself, and in regarfl to its com- 

 parative size with that of the median one of 2nd interstice, being 

 sometimes larger, sometimes equal, but usually smaller. There 

 is occasionally a small fascicle near the apex of 7th interstice. 

 The elytra! interstices are usually (but not alwaj^s) alternately 

 raised. The ^ differs from 9 in having the antennas inserted 

 much closer to apex of rostrum; the anterior legs much longer; 

 the three basal joints of the anterior tarsi greatly expanded and 

 ciliate ; rostrum more coarsely punctate, less cylindrical, and 

 somewhat shorter. The differences in the legs, however, are much 

 more noticeable in some specimens than in others. The ^ 

 (judging by numerous pairs taken in cop.) is usually slightly 

 larger than 2- I have no hesitation whatever in referring several 

 names to this species, either as synonyms or varieties. 



O. LOXGiMANUS, Boisd. — Described from a large ^. The Latin 

 diagnosis is unusually long for BoLsduval, and is besides followed 

 ]jy a much longer description in French. 



O. ASPREDO, Pasc. — Mr. Pascoe says : — " A somewhat isolated 

 species except for the following" (0. carboiuiritisj. It is, how- 

 ever, described as having : "A small tuft of ochraceous hairs on 

 each side at the apex" (of prothorax); "and base and middle of 

 the elytra with a small tuft of ochraceous hairs, preapical callus 

 also tufted." It must, therefore, be very close to cylindrirostns, 

 and is certainly not entitled to more than varietal rank. 



O. CAKBONAHius, Pasc. — Apparently described from an abraded 

 specimen, and therefore not worthy of being considered even as. 

 a variety. It has been noted that the insertion of the antennae 

 is sexually vai-iable. 



