Astathcs and allied Genera of Longicorn Coleoptera. 47 



16. Astathes unicolor. 



Astathes unicolor, Pasc, Trans. Ent. Soc. Lond., (3) iii, 



p. 349 (1867). 

 Astathes coccinea, Pasc, 1. c, p. 350. 



Entirely testaceous with the exception of the last four or five 

 joints of the antennae which are more or less infuscate. In structural 

 characters closely agreeing with the preceding two species. 



Hob. Borneo, Sarawak, Labuan and Sandakan. Types 

 ( $ $ ) in Brit. Mus. 



This species is almost identical in coloration with A. 

 rufescens, Thorns., and its elytra are similarly costate and 

 punctate ; but in the latter species the centro-dorsal 

 tubercle of the prothorax is less raised and is without a 

 pit on each side anteriorly. 



The type of coccinea is slightly narrower than that of 

 unicolor, and the head more closely punctured ; but the 

 difference in coloration which appears to have existed at 

 the time when they were described has since almost com- 

 pletely vanished, probably as the result of fading in one 

 of the specimens. 



17. Astathes fidgida. (Plate IV, fig. 4.) 



Ceramhyx fulgidus, Fab., Syst. El., ii, p. 280. 

 Astathes fidgida, Pasc, Trans. Ent. Soc. Lond., (3) iii, 

 p. 353 (1867). 



Yellowish-testaceous, with the elytra entirely metallic-blue, -green 

 or violaceous, and the antennae infuscate towards the apex. Head 

 with a rather prominent transverse ridge between the oblique flat- 

 tened upper part of the front, and the lower median vertical part, 

 and a similar oblique ridge on each side between the upper part and 

 the lower lateral part of the front ; upper part of the front canalicu- 

 late along the middle, the lower part with a sharp median carina. 

 Elytra each with four acute costse in addition to one running along- 

 side the suture. 



Hah. Sumatra. Type in Copenhagen Museum. 



Though I have not seen the type, I have no doubt as to 

 my correct identification of this species. The prominent 

 ridges on the front of the head serve to distinguish it from 

 all other species of the genus. 



