634 The Philippine Journal of Science ms 



rrhynchus ochroplagiatus Heller, P. eques Heller, P. moro- 

 taiensis Vollh., P. forsteni Vollh., and P. infernalis Fairm. 



The first two and the last one of the above species are certainly 

 very far apart from each other as well as from the other two 

 species, P. morotaiensis and P. forsteni; the last two are the 

 only species of Group I which are closely related to each other 

 or homogeneous in their characters. Another example of a 

 heterogeneous conglomeration is found in Group III. In this 

 group the homogeneous species P. pinorum Pascoe, P. tristis 

 Heller, and P. lacunosus Heller are placed together with the 

 rather heterogeneous species P. perpulcher Waterh., P. erichsoni 

 Waterh., P. schoenherri Waterh., P. venustus Waterh., and P. 

 smaragdinus Behrens. 



I am well aware of the difficulties involved in constructing a 

 satisfactory arrangement of the species of P achy rrhynchus, on 

 account of the great diversity of superficially apparently heter- 

 ogeneous forms ; but I deem it preferable to arrange the species 

 in groups according to their morphologic affinities and along 

 lines of natural relations, such groups to be designated in ac- 

 cordance with a typical form of species with which all the other 

 species in a given group are more or less homogeneous. 



At the present time it seems premature to assign the different 

 species of P achy rrhynchus to subgenera, since in a number of 

 instances subgeneric divisions would have to be created for 

 certain single species. In as much as many localities are repre- 

 sented by a few specimens of a single species, and as many 

 regions are entirely unrepresented in the collections, it seems 

 advisable to make no subdivision until additional material is 

 obtained rather than to make a large number of subgenera of 

 which many would contain but one species each. Owing to the 

 presence of intergrading characters it does not seem advisable 

 to found subgenera upon single species, since more material 

 would probably relegate some of the subgenera to the scrap heap 

 of discarded synonymy. 



GROUP I 



The members of this group are typified by the species Pachy- 

 rrhynchus moniliferus Germ. Small to medium-sized species 

 and rather stout in build. Eyes not especially bulging. Pro- 

 thorax mostly as long as broad, subglobular, the sides evenly 

 rounded with the greatest width at the middle. Elytra short 

 ovate. General color black, with two exceptions, P. sphaerico- 

 llaris Schultze and P. rugicollis Waterh. The following species 



