42 Mr. F. P. Pascoe on some neiv or llttle-hiown 



Byesax [Colydiidae]. 



Head small, vertical, hidden above by the prothorax. Eyes large, 

 rounded, partially divided by the cheek. Antennae retractile, shoi-t, 

 gradually increasing upwards; the first joint rather slender, the second 

 shortest, the third and fourth longest and equal, the fifth triangular, 

 the sixth -to the tenth transverse, the eleventh shortly ovoid. Labrum 

 and epistome very small. Palpi short, linear, the terminal joint ovate. 

 [Mentuui transverse ; labium oblong, entire, as seen in situ.'] Prothorax 

 very transverse, gibbous in the middle, bicornuted anteriorly, the mar- 

 gins dilated and crenidate. Elj'^tra short, very convex, tuberculate, 

 with broad crenulate margins. Legs of moderate size ; tarsi with the 

 first three joints veiy short, equal, with fine hairs beneath. Presternum 

 strongly compressed. Mesosternum toothed. 



In habit this genus closely resembles the Diaperis horrida, 01., 

 with which Mr. Walker's Askla horrida is probably identical. Its 

 real affinity, however, if we are to be guided by the tetramerous 

 tarsi, is with Endophloeus, Pristoderus, and some other little-known 

 and even undescribed forms among the Colydiida3, but diifering from 

 all in its head being perfectly hidden by the prothorax when viewed 

 from above*. 



Byrsax coenosus. (PI. III. fig. 7.) 

 B. rotundatus, pellicula ftisco-murina indutus, infra piceus ; antennis 



palpisque brunneis. 

 Hub. Singapore. 



Nearly orbicular, very convex, dark brown, covered wnth a thin 

 vello wish-brown pellicle, which readily peels off*; prothorax with two 

 short porrect horns in front ; scutellum small, triangular ; elytra each 

 with three tubercles placed near the suture, the two anterior much the 

 largest ; body beneath pitchy ; antennae and palpi light brown. Length 

 4 lines. 



The figures represent the head as seen from below, and the inter- 

 mediate tarsus. 



Sph^romoephus [Scarabeidae]. 

 Germar, Zeitschr. fiir d. Entom. iv. p. 111. 



Sphceromorphus acromia Us. 



S. convexus, fusco-piceus ; prothorace antice elevate, basi inaequali ; elytris 



suboblongis, elongate -punctatis, humeris elevatis bituberosis. 

 Hab. Singapore. 



* The male (which I have only just noticed i)i the Eritish Museum) has two 

 long erect horns on the head. The same collection contains a second species of 

 this genus, also from Singapore. 



