Mr. G. R. Waterhouse on some new Coleoptera. 247 



XXXVI. — Descriptions of new species of Coleopterous bisects 

 belonging to the Genus Apocyrtus, collected by Hugh Cu- 

 ming, Esq., in the Philippine Islands. By G. R. Water- 

 house, Esq., Assistant Secretary and Curator to the Zoo- 

 logical Society. 



[Continued from vol. ix. p. 311.] 

 Order COLEOPTERA. 

 Sect. CURCULION1DES. 

 Div. Pachyrhynchides, Schonh. 

 Genus Apocyrtus, Erichson. 

 In the 'Annals of Natural History* for June 1842, seventeen new 

 species of Apocyrtus are characterized ; descriptions of others I had 

 prepared, but as they extended the paper to too great a length for a 

 monthly journal, I was not sorry to lay aside the latter half of my 

 work for revision, especially as I found several of the species ex- 

 ceedingly difficult to determine. Those already described, for the 

 most part, present well-marked characters ; there are some, however, 

 which upon re- examination I think are doubtful. The Ap. metallicus 

 and fip. lavicollis, notwithstanding the differences in their markings, 

 I am now inclined to regard as varieties. 



Apocyrtus gibbirostris and A.subfasciatus. — The insect described 

 under the former of these names I am now convinced is a female, 

 the abdomen is somewhat convex beneath, and the terminal segment 

 is conical ; the apex of the elytra is slightly produced, and there is 

 a small depression immediately in front of the prominent point. 

 The male has the abdomen slightly concave, the terminal segment 

 semicircular and coarsely punctured (in the female it is less di- 

 stinctly punctured) ; the apex of the elytra is rounded, and the ex- 

 treme point does not form a kind of tubercle as in the female ; the 

 thorax is rather larger in proportion to the elytra, and the rostrum 

 is destitute of the hump ; it is thickly punctured, and has a broadish 

 longitudinal groove extending from the base and terminating about 

 half-way towards the apex ; on each side immediately in front of the 

 eye is an oblong fovea joining the transverse groove which separates 

 the rostrum from the head. This is the insect, I feel little doubt, 

 described by M. Chevrolat under the name Apocyrtus Erichsoni*, 

 a name which has priority over mine. The specimens upon which 

 I founded the Ap. subfasciatus are all males, and possibly are va- 

 rieties of the Ap. gibbirostris (or rather Erichsoni) ; they, however, 

 differ from those, which are certainly the males of gibbirostris, in 

 having the thorax tuberculated instead of being punctured, and also 

 in the markings, as pointed out in the published description. 



Ap. geniculatus. — The rostrum in this species is shorter and 

 broader than others of the genus ; it is rather longer than broad, and 

 the sides are parallel; the transverse groove at the base is rather more 

 strongly marked in the female than in the male, where it is in the 



* See < Revue Zoologique/ No. 7. 1841, p. 22G. 



