614 The Philippine Journal of Science mm 



The general color of body and elytra in the majority of pachy- 

 rrhynchid species is black ; in some cases dark blackish blue, or 

 dark glowing red, dark green, or dark brown. Certain species 

 show very pronounced sculptural characters, such as grooves on 

 the elytra, as in Pachyrrhynchus pinorum Pasc; most other 

 species of this genus have the elytra mostly punctate-striate 

 and the color patterns only somewhat impressed on the surface. 

 In most species of such other genera as Metapocyrtus, Pseuda- 

 pocyrtus, and Apocyrtus the sculptural differences are more 

 strongly pronounced, especially on the prothorax. The color 

 patterns of the pachyrrhynchids consist of colored chitinous 

 callosities, scalelike hair, or mainly scales which are mostly 

 roundish or lentil-shaped, varying in size. The colors of the 

 markings are many, although mostly pale green or blue or 

 bright red as in Pantorhytes ; some are metallic golden green, 

 or with a brilliancy like precious stones, as in Pachyrrhynchus 

 gemmatus or P. taylori. In most species the color markings 

 decrease in beauty after death due to post-mortem changes. 

 Light pale blue colors often change to pale greenish white. 

 The striking opalescence of the scale spots in certain species 

 mostly disappears after death. Also, the peculiar brilliancy 

 of the scale markings is reduced in intensity after death and 

 in some instances disappears entirely. 



The form of the body of the species of the different genera 

 of the pachyrrhynchids is rather variable. The rostrum is as 

 a rule relatively short and broad, the prothorax is subglobular 

 or subcylindrical, and the elytra are mostly ovate. The general 

 forms of body as outlined above apply particularly to the genera 

 Pachyrrhynchus, Pantorhytes, and Sphenomorpha. In the spe- 

 cies of the genus Eupachyrrhynchus the elytra are rather short, 

 broad, and somewhat flattened dorsally. In Macrocyrtus the 

 elytra are very much oblongish and strongly flattened dorsally ; 

 the secondary sexual characters are mostly present at the apical 

 termination of the elytra. In the male this part of the elytra 

 is evenly rounded, in the female the apical ends of the elytra 

 are more or less divergent. The elytra of the species of Proa- 

 pocyrtus are rather short, dorsally flattened, and laterally 

 abruptly declined in an acute angle, while in Apocrytus the elytra 

 are more inflated and subspherical. In the species of Pseudapo- 

 cyrtus the elytra are relatively very short, strongly inflated, 

 most nearly subspherical, and at the apical termination laterally 

 depressed, ending in an abrupt projection, particularly in the 

 female. In species of Nothapocyrtus the elytra are mostly 



