Brazilian Barin^e 133 



tubulation are much larger in the female than in the male, and, in 

 the female, the first abdominal segment — convex and densely 

 sculptured — reminds us of the ordinary generic characters in some 

 of the Diorymerini, such as Hiotus; in the present Stegotid species 

 however, this strange character applies only to the female, the male 

 having very simple abdominal characters. In coronatus the male 

 characters are remarkable, the excavation at the sides of the pro- 

 thorax near apex, bordered posteriorly by erect spines, not being 

 even suggested anywhere else that I have observed. 



Stegotopsis n. gen. 



The single type of this proposed generic group departs very little 

 from Stegotes in general structural characters, but its habitus is so 

 very different, owing to its peculiar coloration and absence of the 

 constantly prominent humeri of Stegotes, that a generic status 

 would seem to be warranted. The resemblance of the elytra to 

 those of the structurally very different Eucoleomerus, of an entirely 

 different tribal group, is most remarkable — possibly a case of 

 protective mimicry. As in some Stegotes, the male is larger than 

 the female and with a longer rostrum. The type may be described 

 as follows: 



Stegotopsis mimetica n. sp. — Form oval, only moderately convex, shining, 

 rufo-piceous in color, the legs, beak and antennae black; elytra flavate, the apical 

 third — about half at the sides — and a humeral spot piceous-black, the suture 

 narrowly blackish; beak moderately slender, cylindric, somewhat thicker basally, 

 minutely, sparsely punctate, coarsely and confusedly at the sides basally, strongly 

 arcuate and as long as the elytra (<?), or a little less arcuate and not quite as 

 long as the elytra ( 9 ); antennae slightly behind the middle, longer in the male, 

 the first funicular joint as long as the next two, the second fully twice as long as 

 wide and, as usual, less thick; club as long as the preceding four joints; prothorax 

 campanulate, two-fifths or more wider than long, the strongly, subevenly arcuate 

 sides becoming parallel at base, the tubulation abrupt, nearly a fifth the total 

 length and but little over a third as wide as the base, the basal lobe very broadly 

 obtuse, with punctured edge; scutellum transversely subquadrate; elytra some- 

 what longer than wide, about three-fifths longer than the prothorax and distinctly 

 wider, triangular, with evenly arcuate sides and rather narrowly rounded apex, 

 the humeri broadly rounded in continuation of the elytral sides; striae very fine 

 and feeble, almost obsolete, the punctulation minute and indistinct, 1, 9 and 10 

 deep; the striae are not dilated at base; under surface remotely and unevenly 

 punctulate; male with two moderate slender erect prosternal spines and a small 

 circular well, the first ventral deeply impressed and finely, sparsely punctate medi- 

 ally; female with the abdomen throughout very finely, remotely punctulate, the 

 first segment with a broadly impressed and simple median line, which is not 

 acute at the bottom. Length 4.5-5.0 mm.; width 2.8-3.2 mm. Brazil 

 (Chapada). March and October! Two specimens. 



The femora are of the usual form in Stegotes, strongly, loosely 

 punctate and finely spiculate beneath. 



