CCELOCEPHALTJS. 147 



3. Ccelocephalus pyginaeus. (Tab. V. fig. 8.) 



C. obJongo-ovalis, sulrparallelus, robustus, pallide testaceus ; capita 

 brevi, rejiexo, junta antennarum iiisertionem bituberculato, punc- 

 tato, pallide testaceo, ad basin nigro suffuso ; thorace quadrato, 

 ad basin constricto et transverse depresso, punctato ; eh/tris 

 robustis, parallelis, punctato-striatis, leviter Jiavo-pubescentibus, 

 ad basin macula nigra semicirculari notatis, etiamque post me- 

 dium duabus macidis triangularibus suffusis ; antennis elongatis, 

 filiformibus, testaceis ; pedibus pallide testaceis. 



Long. corp. If lin., lat. f lin. 



Oblong-oval, subparallel, robust, pale testaceous. Head short, 

 slightly produced, reflected backwards at an acute angle ; eyes large, 

 very prominent, projecting laterally beyond the margin of the thorax ; 

 the antennas are inserted in a slight projection from the surface 

 (which extends a little in front of the margin of the eyes) ; behind 

 the insertion of the antennas are two indistinct tubercles, which are 

 formed by an obsolete Y-shaped fovea; the surface is punctate, 

 especially at the base, and in colour pale testaceous ; at the upper 

 margin (between the eyes) suffused with black. Thorax quadrate, 

 distinctly constricted at the base (more so than in G. fusco-costatus) ; 

 the anterior angles are depressed; the sides submarginate ; at the 

 base is a broad transverse depression, extending to the lateral sub- 

 margination ; the surface is finely punctate. Scutellum triangular, 

 impunctate, fuscous. Elytra broad, robust, parallel, punctate- 

 striate, very finely flavo-pubescent ; at the base is a large black 

 marking, common to both elytra, semicircular in form, of the breadth 

 of the base of the thorax : two other markings, triangular, and more 

 suffused, are situated postmedially ; these do not reach the margina- 

 tion, or the suture, and are at some little distance from the extreme 

 apex. Antennae fine, filiform, more than twice the length of the 

 elytra, pale fulvo-testaceous. Legs somewhat long and attenuated, 

 pale testaceous throughout. 



This species differs from C. fusco-costatus in the form of its thorax, 

 which is more constricted at the base, in its pale concolorous an- 

 tennas, and in the absence of any suffused marking at the margina- 

 tion of the elytra. Although in other respects these insects arc 

 almost identical, it is difficult to believe that these differences (dif- 

 ferences both of form and colour) can be the result of variation, and 

 equally difficult to believe that they are sexual, inasmuch as the 

 length of the antennas, which would be the piincipal sexual charac- 

 teristic, is the same in each. 



From the district of the River Amazon. 



l2 



