178  Buackpurn AND SuHarp—On some New Species and Genera of Coleoptera. 
well as the rostrum and elytra is covered with very fine depressed scales, concealing 
the sculpture. Elytra broad and rather flat, much curved at the sides, the apex a 
little acuminate, bearing numerous longitudinal series of fine punctures, the sides 
a good deal inflexed, but this broad lateral portion not marked off by any carination 
except for a short distance at the shoulder. On the under-surface the squamose 
covering does not cover the middle of the body, where there is only a fine 
pubescence; the apical ventral plates densely pubescent. 
Maui. No. 110. Two specimens, differing very little from one another, except that one has a dark 
mark at the side of each wing case, owing to the absence of the scales at this point.* 
D.S. 
ACALLES. 
Acalles lateralis, n. sp.—Latus, niger, supra piceus, tenuiter squamosus, elytris 
plaga magna laterali albida. Long. exc. rost. 4 m.m. 
Thorax broad and somewhat flattened, so as to form an abrupt edge at the 
side, constricted in front and slightly narrowed behind, depressed in the middle in 
front of the scutellum, and with some black squamosity on the front margin in the 
middle arranged so as to give the appearance of two angular prominences. Elytra 
with very large punctures, and with the second and fourth interstices more raised, 
but in a broken manner, and bearing on the elevated portions a few erect scales ; 
the general colour is dark, but there descends from each shoulder a broad and 
definite white patch which curves inwards and backwards, so as to nearly reach the 
suture about the middle. 
Oahu. No. 37. 
Des: 
Acalles duplex, n. sp.—Valde convexus niger, pallide squamosus, rostro piceo, 
antennis rufis, clavya crassa; prothorace in medio minus argute sulcato; elytris 
erosse punctatis. Long. exe. rost. 3}—4 m.m. 
3, Rostrum broad, closely punctate. Thorax abruptly constricted in front, 
behind the constriction slightly narrowed towards the base, scarcely so long as 
broad; elytra rather broad at the base, with the humeral angles swollen, with very 
coarse punctures or pits, and with the second interstice more elevated than the 
others and rising behind the middle to an acute elevation. The female is a smaller 
and narrower insect, with the thorax much less broad, and the shoulders of the 
elytra undeveloped, and the elevation of the second interstice very slight. 
This species is found by beating the Koa tree on the mountains near Honolulu ; and Mr. Blackburn 
ig sure the two forms are the sexes of one species. The species is, no doubt, quite distinct from 
A. angusticollis, by its form, sculpture, and clothing ; the evident humeral angles of the elytra are of 
themselves sufficient to characterize A. duplex. 
DMS. 
* This species is extant in the National Collection, where it is indicated as a new genus and species 
by Jekel. , 
