Mr. IT. E. Andrewes on Oriental Carabiclse. 505 



rounded at apex. Maxillary palpi with penultimate joint 

 minute, very slender at base, antepenultimate hollowed out on 

 inner side at distal extremity, as long as last joint, last-named 

 widely dilated, securiform, narrow at base, dilated inwards to 

 near middle, rounded at apex, outer edge curved (convex 

 outwardly) and halt' as long again as inner one, angles 

 rounded, a little hollowed out at extremity (upper surface of 

 this joint sometimes depressed, shape varying a little as result 

 of drying). Labrum transverse, almost rectangular, with 

 front angles widely rounded, a little raised along median line, 

 depressed at sides, a single seta on each side-margin, but a 

 few minute additional setai occasionally visible near margin 

 of lower surface, including a pair close together near apex. 

 Leys, and especially tarsi, more slender than in Macrochtlus. 



Other characters as in Macrochtlus. 



This new genus is proposed for a species widely spread in 

 India and Indo-China. It is allied to Macrochtlus, a genus 

 in which the form of the palpi is very variable, and, were 

 there no other differences than those presented in these organs, 

 the new species might very well have been included in it. 

 There arc, however, other peculiarities, and one of a very 

 unusual character. In the Helluonini the maxilhe are 

 normally sharply hooked at apex (rarely below apex), but 

 here they are straight and without any sign of a hook; 

 another unusual feature is the glabrous penultimate joint of 

 the labial palpi. 



Colfax stevensi, sp. n. 



Length irO-12-0 mm.; width 3-50-3-75 mm. 



Piceous black ; elytra each with a median and apical 

 yellowish spot, tront margin of clypeus, a spot on vertex 

 between eyes, side-margins of prothorax, legs, labrum, and 

 palpi testaceous red, antennaj brown, pubescence yellow. 



Head (2 - mm. wide) convex behind, rather flat in front, 

 closely punctate, clypeus with only a few punctures in middle, 

 gence short, joining neck rather abruptly; antennae stout, 

 hardly reaching middle of body, joint 1 cylindrical = 11, 2 

 and 4 about half as long as 1, 3 = 5, whence the joints 

 lengthen slightly to apex. 



Prothorax (2*5 mm. wide) slightly convex, half as wide 

 again as lung, widest at a third from apex, front angles 

 rounded and fringed with long hairs, sides rounded in 

 front, sinuate behind and Sailing on base at nearly a right 

 angle, H m of base widely though slightly produced 



