DOBSUS. 55 



first joint very short, the third about twice as long as the first and 

 subequal in length to the fourth. Prothorax rather small, its 

 lateral margins feebly developed and sometimes partly or wholly 

 obsolete ; when present they curve downwards from the basal 

 margin and extend forwards to a greater or less extent, but always 

 at some distance from the outer angles of the coxal cavities. 

 Mesonotum with or without a stridulatory area, this when present 

 is divided by a median line or groove. Front coxae prominent, 

 strongly transverse ; the intercoxal process attaining to a level 

 with the coxse and not prolonged behind them, its posterior face 

 vertical and very narrow. Tarsi rather long, with the third joint 

 cleft to the middle only ; paronychium of claw-joint setose. 

 Wings with vein Cu 1 joined by a cross vein to Cu 2 with one or 

 two branches behind. 



Owing to the richness of their wing-venation, the two genera 

 included in this group occupy a somewhat exceptional position 

 among the Prionince and appear to be primitive in relation to the 

 other members of the subfamily. Their wing-venation greatly 

 resembles that of Oxymirus (Intro, fig. 5) and other genera of 

 Lepturince. In some other respects also the Philini show an 

 affinity with the latter subfamily. They are closely related to 

 Mantitheus, Fairm., a genus that inhabits Northern China, and are 

 related also, but less closelv, to the Mediterranean genus Vesperus, 

 Latr., which some authors class with the Lepturince. 



Key to the Genera. 



Mesonotum without stridulatory area DCESUS, p. 55. 



Mesonotum with stridulatory area PHILUS, p. 57. 



Genus DGESUS. 



Doesus. Pascoe. Journ. Ent. i. p. 367 (1862) ; Lacord. Gen. Coleopt. 

 viii,p. 161 "~ 



Type, D, tdephoroides, Pasc. 



Range. Central and Southern India, Ceylon, Siam, China, 

 Formosa and Borneo. 



d . Head subvertical in front, slightly elongated and narrowed 

 behind the eyes; mandibles rather long, sharp at the end, 

 crossed at the tips when closed ; labrum rather large ; antennal 

 supports narrow and transverse ; eyes large and prominent, with 

 the lower lobes extended close up to the genal edges in front. 

 Antennae about one-third longer than the body, subserrate ; first 

 joint very short, scarcely twice as long as the second; third twice 

 as long as the first ; fourth to sixth successively and gradually 

 longer; third to eleventh covered with a short pubescence. 

 Mesonotum canaliculate along the middle ; without stridulatory 

 area. Prothorax slightly transverse ; its lateral margin in the 

 form of a carina extends to a greater or less distance from the 

 base and at some distance from the outer angle of the coxal 



