THEATETES.—CHARISIUS. 421 
closely punctured, the metasternum still more coarsely so; legs brownish-black ; antenne black or 
brownish-black, the extreme apex ferruginous. 
¢. Antenne with the basal joint a little longer and stouter than in the female; joint 4 triangularly dilated, 
joints 5 and 6 much dilated within, their inner sides rounded, each much wider than 4 or 7, 5 the widest. 
Anterior tibie unarmed. The lateral lobes of the last ventral segment long and thin, narrow, inwardly 
curved, and narrowing a little towards the apex. (Fig. 11a.) 
Length 72-10 millim.; breadth 34-42 millim. (¢ 2.) 
Hab. Mexico, Jalapa, Almolonga (Hége). 
Six examples, two only of which are males. 
CHARISIUS. 
Last joint of the labial palpi broad, triangular; last joint of the maxillary palpi elongate-triangular, its apical 
and outer sides about equal; mandibles slightly bifid; antenne slender or moderately slender, the joints 
long and subfiliform or somewhat obconic, the third joint about as long as the fourth ; head not very deeply 
sunk into the prothorax, in C. salvini and C. zunilensis somewhat strongly exserted; eyes rather small, 
widely and equally separated in both sexes; prothorax much narrower than the elytra, nearly as long as 
broad and subcylindrical (a little depressed in C. fasciatus), or transverse, feebly bisinuate at the base, 
distinctly margined on all sides, and with a well-defined deep transverse groove behind placed immediately 
above and extending as far laterally as the basal fovese; scutellum small, subtriangular; elytra long, 
subparallel, or a little widened posteriorly with the apices somewhat broadly produced, punctate-striate, 
the sutural stria usually deeply impressed, the humeri broadly rounded and shallowly impressed within ; 
legs sparsely pilose, the femora glabrous ; anterior and intermediate tarsi with the third and fourth joints 
and the posterior tarsi with the penultimate joint broadly lobed beneath, especially in the male, the first 
and second joints of the anterior pair also more or less lobed in this sex; anterior tibie in the male 
simple or a little widened on the inner side about the middle ; first joint of the posterior tarsi long or very 
long; metasternum long (in C. fasciatus very long); prosternum narrow, rather convex, abruptly decli- 
vous behind; body elongate, glabrous, shining, winged. 
This genus is proposed to include four species from Central America, and probably 
one or two others from Tropical South America, all agreeing in the above particulars. 
In general facies Charistus somewhat approaches the Australian genus Zanychilus; but 
is distinguished from it by the last joint of the maxillary palpi being stouter and more 
triangular in shape, and by the cleft mandibles and other characters. 
From Allecula it is separated by the less widened apical joint of the maxillary palpi, 
transversely grooved thorax, and general facies. 
In both sexes the third and fourth joints of the anterior and intermediate tarsi and 
the penultimate joint of the posterior tarsi are very distinctly lobed beneath, still more 
broadly so in the male. In the males of the four Central-American species the lateral 
lobes of the last ventral segment are a little curved and more or less spoon-shaped or 
spatulate in shape ; and the central sheath is more or less acuminate, but with the apex 
rounded or slightly hooked. 
1. Charisius fasciatus. (Tab. XIX. figg. 12, 12¢,¢; 13,2, var.) 
Elongate, shining, varying in colour—red, reddish-brown, or brownish-black, the elytra each with an oblong 
patch on the disc before the middle, a transverse zigzag band some distance beyond the middle (extending 
to the lateral margin but not to the suture), and a similar but oblique band nearer the apex, stramineous 
