44 MANDIBULATA. — COLEOPTERA. 



much attenuated in front, coarctate, produced behind towards the scutellum : 

 elytra subquadratC;, with an impression near the scutellum, shorter than the 

 abdomen -.femora simple; tibice spurred on the outer margin near the apex, 

 which is truncate ; tarsi with a single simple claw. 



Known at once by the tarsi being furnished with a single claw 

 only, and from the three preceding genera by the antennse being 

 placed before the middle of the rostrum, the thorax being acu- 

 minated in the middle opposite to the scutellum, and by the tibiee 

 having spurs on their outer margin towards the apex : the species 

 devour seeds. 



f Sp. 1. Pseudacori. Niger, punctatus, thoracis laterihus tenui ferrugineis, elytris 



striatis, sutura basi albidd. ■ (Long. coi"p. 2 lin.) 

 Rh. Pseudacori. Fabricius, — Mo. Pseudacori. Steph. Catal. 156. No. 1584. — 



Curtis, Yii. pL 292. 



Dull black, punctate ; beneath flavescent: thorax with a dorsal channel, and the 

 sides narrowly edged "with dull ferruginous : elytra striated, ivith an oblong 

 whitish or cinerascent spot at the base of the suture: legs black; base of 

 antennas ferruginous; and a few scales of similar hue at the base of the 

 rostrum. 



The only examples I have seen of this insect were found in 

 Devonshire, and in the Isle of Wight. 



Genus CCLXXXVII. — Acalles, Sclumherr. 



AntenncB geniculated, 12-jointed, rather stout; funiculus 7-jointed, its two 

 basal joints obconic ; the remainder subrounded, and slightly coarctate ; the 

 club short, ovate, acuminate. Rostrum longer than the thorax, stout, a little 

 bent, inserted during repose in a deep elongate pectoral groove, which is strongly 

 margined: eyes minute: thorax rather long, convex, lobate behind the eyes, 

 narrowed in front, the base truncate: scutellum wanting: elytra connate, 

 subgibbous, embracing the sides of the abdomen : legs rather stout, the inter- 

 mediate pair shortest ; tibice slightly compressed, the apex furnished with a 

 stout tooth within. 



This genus differs from Tylodes of Schonlierr — which is not 

 indigenous — by the structure of the antennse and of the pectoral 

 groove for tlie reception of the rostrum, as well as in other less 

 evident characters ; from Mononychus by having two claws at the 

 apex of the tarsi ; and from Centorhynchus and tlie allied genera 

 by the elytra being connate or united. 



Sp. 1. Ptiuoides. Piceus, cinereo-sqiiamosus, supra spinulis erectis nigris 77iuri- 

 caiis, antennis, rostropedibusque ferrugineis. (Long. corp. 1 — 2 lin.) 



