ANCHASTUS. 391 



c. Hind angles of the pro thorax not carinate ; antennae with the third joint a 



little shorter than the fourth ; front completely margined ; prosternal 

 sutures not channelled in front; elytra separately rounded at the 

 apex; coxal plates broadly widened inwards, becoming very narrow 

 outwards Species 13. 



d. Hind angles of the prothorax bicarinate ; front completely margined ; pro- 



sternal sutures deeply channelled in front ; elytra conjointly rounded at 

 the apex ; coxal plates broadly widened inwards, triangularly dilated 

 near the middle, and becoming very narrow outwards. 



c'. Antennae with the third and fourth joints equal Species 14, 15. 



d' . Antennae with the third joint very short, not longer than the second . Species 16. 



1. Anchastus sanguineus, (Tab. XVII. fig. 14, s .) 



<5 . Elliptic, broad, rather convex, moderately shining ; sanguineous, the labrum, the antennae, a broad median 

 vitta on the prothorax, not quite reaching the base, the scutellum, the legs, and the body beneath, the 

 pro- and mesosternum and the propleurae excepted, deep black ; above and beneath thickly pubescent, the 

 pubescence partaking of the ground-colour. Head thickly punctured, convex, declivous in front, the front 

 separated by a short space from the anterior margin and feebly carinate ; antennae moderately long, the 

 joints from the third broadly flattened and serrate, 3 and 4 equal, 2 very small. Prothorax broader than 

 long, the sides rapidly converging from the base, a little rounded in front ; the hind angles greatly 

 produced, divergent, sharply and obliquely unicarinate ; the surface closely, finely punctate. Elytra as 

 wide as the prothorax at the base, arcuately narrowing from about the middle, a little flattened on the 

 disc and explanate at the sides, the apices separately rounded ; coarsely and deeply punctate-striate, the 

 interstices convex and thickly punctured, subgranulate towards the base. Beneath finely, rather closely 

 punctate ; prosternal sutures not channelled in front. 

 2 . Var, The labrum, the body beneath, the coxae, and trochanters rufo-testaceous, the median vitta on the 

 prothorax obliterated, the scutellum with the apex only black; the antennae less broadly dilated ; the 

 prothorax more rounded at the sides and less narrowed in front ; the frontal carina less distinct in the 

 middle. 

 Length 9, breadth 3| millim. 



Rob. Mexico, Vera Cruz (coll. Janson : 2 ), Teapa in Tabasco (H. H. Smith : 6 ). 



This very fine species either varies greatly in the colour of the under surface &c, or 

 the sexes differ in this respect. Unfortunately a single example only of each sex has 

 been received. It has no near ally, so far as I am aware, and the insect is unknown to 

 Dr. Candeze. 



2. Anchastus ruficollis. (Tab. XVII. fig. 15, s .) 



Elongate-oval, rather convex, shining ; deep black, the prothorax rufous, the propleurae rufo-testaceous ; thickly 

 pubescent, the pubescence on the prothorax and elytra partaking of the ground-colour, that on the head 

 and on great part of the under surface fulvo-cinereous. Head thickly, finely punctate, convex, declivous 

 in front, the front (as viewed from beneath) sharply margined ; antennae ( 3 ) extending to a little beyond 

 the hind angles of the prothorax, the joints from the third moderately widened and serrate, 3 and 4 equal 

 in length. Prothorax about as long as broad, longitudinally convex, subparallel to near the middle and 

 thence arcuately narrowing to the apex; the hind angles acute, strongly produced, not divergent, sharply 

 and obliquely unicarinate, the carina short ; the surface very finely, sparsely punctate, the punctuation 

 becoming closer towards the sides and apex, canaliculate behind. Elytra comparatively short, arcuately 

 narrowing from about the middle, separately rounded at the apex ; finely and shallowly punctate-striate, 



