Brazilian Barin^e 163 



femora mutic and the tibiae evenly rounded externally toward 

 base. The prothorax is not tubulate at apex and the scutellum is 

 small, quadrate, uneven in surface and glabrous. 



In regard to the single tarsal claw mentioned in the generic 

 table of the tribe, there may be some doubt. The unique type 

 specimen has only one complete tarsus. The claw-joint of this 

 tarsus bears a single rather long and slender, arcuate claw, but 

 whether there was originally a second similar claw, the two being 

 free and divergent as in the next primary subdivision of the tribe, 

 it is impossible to state at present, and I can only say that, as there 

 has been some cause at work destructive to the tarsi of this specimen, 

 it is somewhat more than rationally conceivable that a second 

 claw may have existed. At any rate, the genus is widely isolated 

 in its general nature and habitus, and would be greatly out of 

 place among those with which it would have to be associated under 

 the primary characters of straight mandibles and free diverging 

 claws. The type may be described as follows: 



Starcus rugulosus n. sp. — Oblong-suboval, moderately convex, feebly shining, 

 deep black throughout, the legs somewhat piceous, the antennae black; slender 

 white squamules above very evenly distributed, sparse on the pronotum and 

 suberect in the even single interstitial series, sparse beneath; beak (o 71 ) slender, 

 moderately arcuate, strongly sculptured and as long as the prothorax, the latter 

 but little wider than long, the sides parallel in basal, gradually convergent in 

 about apical, half; apex half as wide as the base; surface very coarsely, densely 

 punctate, with faintly subprominent median line; elytra oval, rather narrowly 

 rounded behind, not a fifth longer than wide, very slightly wider than the protho- 

 rax and barely one-half longer, coarsely, deeply striate, the strial punctures feeble 

 and nude, the intervals but little wider than the striae, with single series of strong 

 and subasperate punctures, bearing the suberect squamules; interstitial surfaces 

 throughout above feebly micro-reticulate; abdomen feebly impressed and finely, 

 remotely squamulose basally in the type. Length 1.5 mm.; width 0.72 mm. 

 Brazil (Santarem). A single male example. 



There is nothing known to me with which to compare this species 

 at all closely. Some features, such as size and antennal structure, 

 may possibly indicate some relationship with Micropalocus, but the 

 sculpture and mandibles are entirely different. 



Neplaxa n. gen. 



This is one of the most remarkable genera of the present tribe. 

 The body is stout, very convex, glabrous, ventricose, with thick 

 and subcylindric beak, having very broadly decussate mandibles. 

 The antennae are submedial, slender, the second funicular joint 

 very long and slightly curved distally, twice as long as the first 

 and as long as the succeeding four combined, the elongate-oval and 

 densely pubescent club subevenly divided by the moderate sutures 

 and as long as the preceding five joints. The anterior coxae are 



