154 HETEROMERA. 
and the thorax and elytra less densely and much more coarsely punctured. The punc- 
tuation of the thorax is close and a little finer than in O. litoralis; the three examples 
are without trace of a median vitta on the thorax and of any marking near the suture 
of the elytra. 
é largtack, ) 
7. Oxacis litoralis. (Tab. VII. fig. 11, 2.) 
Elongate, opaque, somewhat thickly clothed with short ashy pubescence ; pallid testaceous or testaceous, the 
head often infuscate between the eyes, the prothorax with the sides and a median stripe of variable width 
(the latter often obsolete), and the elytra with a broad lateral stripe and sometimes a very short stripe on 
either side of the suture at the base (the latter frequently obsolete), piceous or brown. Head coarsely and 
closely punctured, the eyes and the tips of the mandibles black, the antenne testaceous or fusco-testaceous ; 
prothorax longer than broad, the sides arcuate in front and gradually converging behind, the disc with a 
shallow depression on each side anteriorly and transversely depressed in the middle before the base, the 
surface coarsely and closely punctured ; elytra thickly and finely punctured, and usually with traces of one 
or two slightly raised lines on the disc; beneath densely and very finely punctured, pallid testaceous, the 
last two or three ventral segments sometimes darker; legs testaceous, the femora similar in both sexes, 
the claws toothed at the base. 
Length 5-11 millim. (¢ 9.) 
Hab. Mexico, Acapulco (Hége); GUATEMALA, Champetios and San José (Champion) ; | 
NicaraGua (Sallé) ; Panama, near the city (Champion). 
Found in profusion by myself on the sea-shore at Champerico and San José, on the 
Pacific coast of Guatemala. 0. litoralis is closely allied to O. /ucana (Lec.), but differs 
from it in the sparser and much coarser punctuation of the head and thorax. It varies 
exceedingly in size, and the male is usually (but not always) very much smaller than 
the female; in about half the specimens the short stripe on the elytra on either side of 
the suture at the base is obsolete. ‘The apical joint of the antenne is unemarginate in 
both sexes. A fully-coloured female example from Acapulco is shown on the Plate. 
( Fortra tio) 
8. Oxacis limbata. , 
Elongate, subopaque, thickly clothed with rather coarse ashy pubescence ; testaceous, the prothorax with a 
median stripe and (except in one example) the sides at the middle more or less piceous, the elytra seneo- 
piceous with the suture rather broadly and the lateral margin very narrowly pallid testaceous. Head 
closely and rather coarsely punctured, the eyes and the tips of the mandibles black or brown, the vertex 
darker in the middle in one example ; antenne testaceous, with the second and third joints infuscate ; 
prothorax longer than broad, the sides moderately rounded anteriorly and gradually converging behind, the 
disc depressed in the middle before the base and with a shallow depression on either side anteriorly, the 
surface densely and rather coarsely punctured, the punctures coarser and less close along the middle of 
the disc, the latter with traces of a smooth raised line in one example; elytra parallel to about the middle 
and gradually narrowing beyond, closely and moderately finely punctured, and with one or two fine raised 
lines on the disc; beneath very closely and finely punctured, testaceous, the venter more or less stained 
with piceous ; legs testaceous, the claws toothed at the base. 
Length 63-8 millim. (¢ 9.) 
Hab. Mexico, Juquila (Sallé), Chilpancingo (fdge). 
Three examples. This species is closely allied to O. litoralis, from which it may be 
known, apart from the difference in the markings of the elytra, by the denser punc- 
