ATRACTOSOMUS. 299 



I have seen four specimens of the black or typical form, and three of the variety, 

 the latter being all of the female sex. In one example of the light-coloured form the 

 thorax is black and the elytra brown. The variety closely resembles Anoplischius 

 atractodes, but may be distinguished from it by the horizontally raised sides of the 

 mesosternum. 



3. Atractosomus mucronatus. 



Elongate, subfusiform, convex, shining ; brown or reddish-brown, the prothorax almost entirely, or with a 

 broad space across the middle, infuscate, the antennae piceous or obscure ferruginous, the legs ferruginous 

 or brownish ; above and beneath rather sparsely clothed with moderately long yellowish-cinereous hairs. 

 Head convex, closely, rather coarsely punctate, slightly depressed in the middle between the eyes ; the 

 frontal carina moderately prominent, rounded anteriorly ; the eyes finely granulated ; antennas short,, 

 rather slender, joints 3 and 4 equal in length. Prothorax feebly convex, much broader than long, trape- 

 zoidal, the sides a little rounded anteriorly ; the hind angles moderately produced, incurved at the tip,, 

 feebly earinate above ; the surface thickly, finely punctate, the punctures more scattered towards the 

 base, canaliculate behind. Scutellum sparsely punctured. Elytra moderately long, narrowing almost 

 from the base in the male, more parallel in the female, the apices mucronate ; finely and lightly punctate- 

 striate, the interstices sparsely punctured and (except on the basal declivity) almost flat. Beneath thickly 

 punctured ; prosternal sutures not excavate in front ; mesosternum with the sides raised, horizontal, and 

 abruptly declivous in front ; posterior coxal plates obliquely narrowing outwards. 



Length 9|-11, breadth 21-3 millim. ( tf $ .) 



Hab. Guatemala, Cerro Zunil 4000 feet (Champion). 



Five specimens. Closely allied to A. corax, but smaller, the thorax less convex, 

 more transverse, less rounded at the sides anteriorly, and with the hind angles more 

 feebly earinate, the sides of the mesosternum less raised. The insect, at first sight, is 

 extremely like Anoplischius variabilis. 



4. Atractosomus fusiformis. (Tab. XIII. fig. 14, <$ .) 



Elongate, fusiform, convex, rufo-piceous, very shining, sparsely clothed above and beneath with long fulvo- 

 cinereous hair ; the under surface, femora, and tibise, and the basal three joints of the antennae, in great 

 part piceous. Head sparsely, coarsely, unequally punctate, strongly declivous in front : the frontal 

 carina on either side obliquely raised, and in the middle flexed downwards and not visible from above ; 

 eyes large and smooth ; antennas feebly serrate, extending to a little beyond the humeri in the female, 

 slightly longer in the male, joint 3 shorter than 4, twice the length of 2. Prothorax subcorneal, nearly 

 as long as broad, distinctly compressed at the sides before the middle, the sides slightly sinuate behind ; 

 the hind angles moderately produced, almost smooth, sharply earinate above, curved inwards at the tip ; 

 the surface sparsely, very finely punctate, the punctures becoming coarse towards the apex and minute at 

 the base, deeply canaliculate in the middle behind, and with transverse deep basal grooves. Scutellum 

 very sparsely punctured. Elytra three and a half times as long as the prothorax, rapidly narrowing from 

 a little below the base, the apices mucronate ; finely and shallowly punctate-striate (the punctures coarser 

 in one specimen), the striae deeply impressed on the basal declivity ; the interstices flat, somewhat thickly, 

 finely punctate. Beneath finely, rather sparsely punctate ; prosternal sutures deeply grooved anteriorly ; 

 posterior coxal plates very feebly widened opposite the point of insertion of the femora ; mesosternum 

 subhorizontal, the sides thickened and moderately raised, almost vertical in front. 



Length 17-19, breadth 41-5 millim. ( <3 $ .) 



Hab. Panama, Volcan de Chiriqui 3000 feet (Champion). 



Three specimens. This very distinct species may be readily identified from its allies 



2Q2 



