202 PROCEEDINGS OF THE NATIONAL, MUSEUM vol. 65 



somewhat longer than wide, triangular, and shagreened. Elytra 

 wide, moderately, strongly, obliquely convex, parallel to apical 

 fourth, then broadly conjointly rounded, two times as long as wide, 

 strongly shining and not shagreened, everywhere (nearly as strongly 

 as on the prothorax) simply punctate. Legs bronzy, and the tarsi 

 dark brown. 



This magnificent, charming little species, the first species of this 

 genus from the Antilles, I have received from my highly honored 

 friend and fellow traveler, Mr. Gylek, president of the Wiener 

 Coleopt. Society. I beg leave to name this pretty, new species after 

 my friend, who has always offered assistance in my studies with his 

 entomological material. 



MICRASTA PYGMAEOLA Obenberger 



Micrasta pygmaeola Obenberger, Entomol. Blatter, vol. 13, 1917, p. 91. 



The following is a translation of Obenberger's original descrip- 

 tion : 



Habit: Guadeloupe. 



Length : 2 mm. 



Head and prothorax blue, elytra of a golden-bronzy color, antennae 

 and femora blackish, the tibiae and tarsi yellow. 



Head with a dimple-like depression in the middle, convex, smooth, 

 shining, and not shagreened, everywhere sparsely, moderately, 

 strongly, and simply punctate. Antennae long, reaching almost to 

 the base of prothorax; each joint, beginning at the third, is serrate 

 and expanded. Prothorax one and one-third times as wide as long, 

 convex, and in front and at base evenly truncate ; at the middle the 

 sides are expanded, from there (at the front somewhat stronger than 

 at the base) anteriorly and posteriorly arcuately narrowed. Above 

 convex, shining, not shagreened, simply, moderately, densely, but not 

 too strongly punctate, similar to that on the head. Elytra somewhat 

 more than two times as long as wide, parallel, shining, densely, mod- 

 erately, strongly, simply punctate, everywhere with feebly distinct, 

 very short, whitish hairs (this pubescence not very distinct, and only 

 visible with a very strong lens). Elytra parallel to the apical third, 

 then broadly rounded to the tips, which are conjointly rounded. The 

 dorsal part of the abdomen which is covered by the elytra is dark 

 bronzy-green, otherwise the part is yellow. 



This pretty little species is separated from gyleki by the color, 

 and the upper side not shagreened, the color of the tarsi, the different 

 form of the prothorax, etc. 



Genus MASTOGENIUS Solier 



Mastogenius Solier, Gay's Hist. Nat. Chile, Zool., vol. 4, 1851, pp. 507-508.— 

 Lacordaire, Gen. Col., vol. 4, 1857, p. 85. — Kerremans, Wytsman's 

 Gen. Insectorum, fasc. 12, pt. 4, 1903, pp. 332-333. 



Haplostethus LeConte, Trans. Amer. Philos. Soc, new ser., vol. 11, 1859, 

 pp. 253-254. 



Head regularly convex, with or without a feeble longitudinal 

 groove; epistoma moderately wide between the antennal cavities and 



