74 PROCEEDINGS OF THE NATIONAL MUSEUM vol.104 



Type: Male, in BM, from Santarem, on the Amazon, Brazil; two 

 paratypes, both females, one, in BM, taken on the Amazon by Bates, 

 the other, USNM 61832, without any locality label. 



Remarks: Only three specimens of this species are known, but these 

 are quite distinct in their markings and in the shape of the aedeagus. 

 The pale streak in the median elytral vitta usually does not extend 

 as far as in D. interlineata Berg and the pronotal spots are not widely 

 separate as in that species. It is also a somewhat smaller, more 

 slender beetle. The aedeagus resembles somewhat that of D. pittieri 

 from Venezuela, but the Brazilian species has a quite differently 

 shaped, longer and narrower head, with only a single fovea instead of 

 a cluster of punctures on each side. 



Disonycha suturalis Bryant 



Figure 67 



Disonycha suhiralis Bryant, Ann. Mag. Nat. Hist., ser. 11, vol. 11, pp. 652-3, 

 1944. 



About 6 mm. in length, oblong oval, somewhat shiny although very 

 faintly alutaceous, prothorax finely and elytra more distinctly and 

 densely punctate; pale yellow; head with mouthparts and tubercles 

 dark; elytra with narrow sutural vitta, humeri darkened and a spot 

 in middle near the apex; breast, tibiae and tarsi, and apex of hind 

 femora dark, explanate margins wider than usual. 



Head pale except for tubercles and mouthparts, alutaceous and with 

 coarse punctures scattered across vertex, a cluster of punctures on 

 each side near eye, tubercles distinct, frontal carina broad, lower front 

 rather short, interocular space half width of head. Antennae dark 

 piceous with the three basal joints pale edged and the terminal joint 

 paler reddish brown, joints not veiy long. Prothorax fully twice as 

 wide as long, with curved sides and wide explanate margin, depressed 

 over the scutellum, alutaceous, finely punctate, entirely pale. Scutel- 

 lum dark. Elytra also with wide explanate margin, pale yellow with 

 narrow sutural vitta and a dark streak down humeri and an irregular 

 spot at middle of the apical angle, sometimes also a spot halfway down 

 on the side of the elytra, surface alutaceous and densely and more 

 coarsely punctate than the pronotum. Epipleura pale. Body be- 

 neath with breast dark, tibiae and tarsi, apex of femora, and apical 

 half of hind femora dark. Length 6.1 mm., width 3 mm. 



Type and paratypes: In BM (10 specimens), collected by G. E. 

 Bryant at Estancia la Noria, Rio San Javier, Santa Fe, Argentina, 

 December 20, 1911. 



Remarks: This species has a less coarsely punctate pronotum and 

 more densely punctate elytra than D. caustica Harold (D. nigrosutur- 

 alis Bryant). None of Bryant's ten specimens shows any fully de- 



