IG^ MANDIBULATA. COLEOPTERA. 



depressed : scutellum very broad : ahdomcn very broad, concave above, with 



the sides strongly margined, the apex very obtuse : hgs sliort : tiblw simple ; 



slightly setose : tarsi slender. 



The great width and comparative brevity of the only known 

 species of this genus, combined with its depressed form, and the 

 faculty it possesses of roHing itself into a ball, like an Agathidium, 

 or rather in a manner peculiar to itself— its head being applied to the 

 breast, and its abdomen to the thorax — at once point out the 

 propriety of detaching it from the host of Aleocharae, with which it 

 was at first associated. 



Sp. 1. complicans. Plate xxvi. /. 4. — Ater, nitidus, glaherrimus, colcoptris 

 disco, anfennis pedihusque castaneis, abdomine obtusissimo. (Long. corp. 

 §-f lin.) 



£n. complicans. Kirby MSS. — Steph. Caial. 268. No. 2769. 



Deep black, very shining and glabrous, smooth : head narrower than the 

 thorax, rounded, inflexed : thorax short, convex ; elytra flat, broader and 

 rather longer than the thorax, castaneous, with the sides and apex black : 

 abdomen above twice as long as the elytra, very broad, concave above, 

 with the sides strongly margined, beneath convex, the apex very obtuse; 

 legs chestnut : antennae the same. 



The elytra are sometimes entirely of an immaculate pitchy-black. 



On the 1st of January, 1825, I met with six specimens of this 

 apparently scarce insect, in a small quantity of moss, collected at the 

 foot of an old wall near Ripley : it has also been " taken near Great 

 Blakenham, Suffolk. This is a very singular little animal, in some 

 circumstances agreeing with Agathidium ; by applying closely its 

 head to its breast, and covering its elytra with its abdomen, it 

 assumes the appearance of a minute shining black stone." — Kirby 

 MSS. " Marton-lodge, not uncommon." — Rev. G. T. Rudd. 



Genus CCCCXCIII. — Callicerus, Gramnhorst. 



Antennas 11-jointed, the basal joint rather stout, elongate, subclavate, second 

 and third short, obconic, six following equal, transverse or rounded-turbi- 

 nate, penultimate cylindric elongate, terminal as long again, also cylindric. 

 Palpi maxillary biarticulate, with the terminal joint very large, campanu- 

 late, truncate at the apex: head orbiculate, convex behind: eyes lateral, 

 hemispheric : thorax suborbiculate : elytra very short, with the apex 

 obliquely truncate : abdomen rather flat above, with the sides strongly mar- 

 gined : legs slender ; tibiae unarmed. 



