HETEROMERA. O37 
DIAPERIS (p. 174). 
Diaperis maculata (p. 174). 
To the localities given, add :—Mexico, Misantla (Flohr); Guatema.a, Coban (Conradt). 
ARRHENOPLITA (p. 175). 
2(a). Arrhenoplita punctatissima. 
Elongate, convex, ferruginous, shining. Head large and broad—( ¢) densely, rather coarsely punctured 
between and behind the eyes, smoother in front, armed with two long, erect, stout, widely separated 
horns, which are placed just within the eyes, the anterior margin reflexed, and triangularly raised on 
either side in front, the intraocular space flat—( 2 ) very densely, rugosely punctured, the epistoma a little 
smoother ; antenne with the seven outer joints widened, 5-10 very strongly transverse; prothorax short, 
strongly transverse, slightly rounded at the sides, and very little wider at the base than at the apex in the 
male, gradually narrowing from the base in the female, the surface densely, rather ccarsely punctate ; 
elytra moderately elongate, subparallel in their basal half, with rows of coarse punctures placed in almost 
obsolete strize, the interstices flat, thickly and coarsely punctate throughout, the humeri obtuse. 
Length 44 millim. (¢ 92.) 
Hab. Muxico, Acapulco (ége). 
\ 
One female and two male examples. This species differs from all the allied forms 
in the coarsely punctured elytral interstices ; the thorax is similarly, but more densely, 
punctate; the cephalic horns of the male are widely separated, long, and erect; the 
head in the female is unarmed, and more densely, rugosely punctate than in the 
"male, 
10 (a). Arrhenoplita occidentalis. 
3. Elongate, ferruginous, slightly shining, very finely pubescent. Head moderately large, densely, very finely 
punctate, armed with an exceedingly stout, short, compressed horn on either side between the eyes, the 
space between them deeply excavated, the anterior margin not reflexed, the epistoma with an indistinct 
prominence on either side in front; antenne rather elongate, with the seven outer joints moderately 
widened, 5-10 transverse ; prothorax transverse, much wider at the base than at the apex, the sides a 
little rounded anteriorly, almost straight behind, the surface densely, very finely punctate; elytra 
moderately elongate, parallel in their basal half, deeply punctate-striate, the interstices feebly convex, 
closely, minutely punctate, the humeri sharply rectangular. 
Length 4 millim. 
Hab. Mexico, Acapulco (Hége). 
Though we have only received a mutilated example of this species, it is advisable to 
name it. A. occidentalis is not very closely allied to any other member of the genus 
known to me. The cephalic horns are exceedingly stout, short, and compressed; it is 
probable that they vary in length, as in some of the allied species. The punctuation 
of the head and thorax is very fine and dense. 
