662 The Philippine Journal of Science 1923 



Length, 12.5 millimeters (without rostrum) ; width, 5.5. 



Ternate; Halmahera; Sumatra. 



Pachyrrhynchus forsteni Vollh. is closely related to none of the 

 Philippine Pachyrrhynchus species in the sense that P. infemalis 

 Fairm. is to P. orbifer Waterh. ; its nearest relative is P. moro- 

 taiensis Vollh., and these two are somewhat isolated represen- 

 tatives of the genus. 



GROUP IV 



Group IV is typified by Pachyrrhynchus schoenherri Waterh. 

 and comprises relatively small species. The following species 

 are placed in this group : Pachyrrhynchus schoenherri Waterh., 

 P. apocyrtoides Schultze, P. signaticollis Schultze, P. bucasanus 

 Schultze, P. signatus Schultze, P. erichsoni Waterh., and P. 

 semiignitus Schultze. 



Key to the species of Pachyrrhynchus, Group IV. 

 a\ Elytra with distinct and well-defined roundish spots, not confluent, and 



6*. Prothorax with two more or less roundish spots dorsolateral^ in 



the middle, one toward each side. 

 V. Prothorax with a dorsally interrupted transverse band in the middle. 

 P. signaticollis Schultze. 

 c\ Prothorax without a scale line dorsally at anterior and posterior 



margins; spots on elytra small. 

 c*. Prothorax with a scale line dorsally at anterior and posterior mar- 

 gins; spots on elytra large P. bucasanus Schultze. 



(f. Elytra without any sutural spots. 



<f. Elytra with two sutural spots and eight more on each elytron; 



general color of elytra glowing red P. schoenherri Waterh. 



e\ Elytra glossy dark green or coppery red with sixteen spots. 



P. erichsoni Waterh. 

 e\ Elytra rather dull black, usually with eighteen spots. 



P. erichsoni eschscholtzi Waterh. 

 "". Elytra with ill-defined spots or more or less abbreviated longitudinal 

 or transverse stripes. 



f. Elytra without a sharply defined transverse stripe in the 



f. Elytra with a sharply defined transverse stripe or band in 

 the middle; general color dark purplish violet. 



P. signatus Schultze. 



g\ General color black; prothorax with a spot toward each 



side in the middle, dorsolaterally; elytra with the spots 



not sharply defined P. apocyrtoides Schultze. 



fir. General color glossy glowing red; prothorax without any 

 dorsolateral spots; elytra with well-defined spots. 



P. semiignitus Schultze. 



