214 SEEEICOENIA. 



One female specimen in our series. The species, like its more northern congeners, 

 seems to be rare, as de Bonvouloir mentions two only. 



ISORHIPIS. 



Tharops, Castelnau, in Silberm. Rev. Ent. hi. p. 168 (1835) ; de Bonvouloir, Mon. des Eucnemides, 



p. 95 (nomen prseocc.) . 

 Isorhipis, Lacordaire, Faun. Ent. d'env. Paris, i. p. 622. 



Until the present time this genus has been represented only in Europe and temperate 

 North America; two species are now added, one of which is from near the southern 

 limit of our region, indicating the probable existence of others in more northern 

 localities. 



1. Isorhipis vagans. 



Piceous-black, opaque, sparsely clothed with short yellowish-grey pubescence ; antennas ferruginous-brown : 

 head densely punctate ; thorax slightly broader than long, very little narrowed towards the apex, sides 

 very feebly arcuate, surface closely coarsely punctate, median line impressed from the base to the middle, 

 a short transverse impression on each side ; elytra finely striate, strise indistinctly punctate, intervals flat, 

 closely granulate ; body beneath concolorous, less opaque, the pubescence longer and more golden ; legs 

 entirely piceous. 



Length 7 millim. 



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



This species is more nearly related in its form to 1. nigriceps^ the thorax being 

 wider than long and the scutellum moderately long. It is quite different from the 

 North-American forms. 



One male. 



2. Isorhipis holosericea. (Tab. x. fig. 8.) 



Piceous-black, opaque, clothed sparsely with a grey silken pubescence, giving a variable lustre ; antennae 

 piceous-black, the two basal joints rufo-testaceous : head very densely punctate ; thorax slightly wider 

 than long, sides parallel posteriorly, arcuate in front, disc moderately convex, the median impressed line 

 extending from the base to the apex, surface very densely punctate-granulate and opaque, the pubescence 

 directed in a varying manner ; scutellum oblong, narrowed at the tip ; elytra striate, striae rather coarsely 

 punctured, intervals flat, closely punctate, granulate at the base, smoother near the apex, surface with 

 silken pubescence arranged in the usual longitudinal manner, except in a large oval space behind the 

 middle, on whichlit is directly transverse; beneath black, closely finely punctate and with silken 

 pubescence ; legs black, tarsi rufo-testaceous. 



Length 5 millim. 



Hab. Panama, Bugaba (Champion). ^ 



Evidently related most closely to /. obscuricomis, from which it differs (by descrip- 

 tion) in the colour of the antennae and legs, as well as in the arrangement of the 

 pubescence. Two female specimens. 



