CHAULIOGNATHUS. : 75 
21. Chauliognathus apicalis. 
Niger; mandibulis basi maculisque duabus ad antennarum insertionem albis; prothorace elytrorumque apicibus 
flavis, illo puncto mediano fusco, elytris abbreviatis. Long. 9 millim. gd. 
Hab. GuateMaLa, Senahu (Champion). 
The head of this species is of the same shape and marked as in C. nagriceps, the sides 
of the head in front of the eyes being whitish, and the colour extending into two spots, 
from which the antenne take their origin. The thorax is scarcely so wide as the head, 
and is, on the average, a little longer than wide, ochreous yellow, with an indistinct or 
well-marked central spot. The mesosternum is, for the most part, white. The ventral 
plates are broadly margined with yellow, excepting the anal valve of the male, which is 
black. It is rather nearly allied to C. nigriceps, but well distinguished by the black 
elytra, with only the tip yellow. 
22. Chauliognathus emaciatus.. (Tab. V. fig. 17.) 
Pallide lividus; capite nigro, infra et antice flavo; antennis, palpis, prothoracis disco, femoribus externe, tibiis 
et tarsis nigris ; elytris paullulum abbreviatis. Long. 12millim. ¢ 2. 
Hab. Guatemata, Capetillo, San Gerénimo (Champion). 
The head is rather large, and as wide or wider across the eyes.than the thorax: some- 
times the whole front is yellow; but more often the space immediately above the mouth 
is black. The disk of the thorax is wholly black, but is indented by a yellow spot in 
the centre of the base ; the margin is entirely yellow. ‘The scutellum is black. The 
underside is wholly yellow in both sexes. 
A Capetillo specimen is figured in the Plate. 
23. Chauliognathus histrio. 
Callianthia histrio, Dej. Cat. 8rd ed. p. 118 (sec. Sallé coll.). 
Flavus; occipite, antennis, elytris (limbo toto excepto), alis, femorum apicibus, tibiis tarsisque nigro-fuscis ; 
elytris abbreviatis. Long..10-11 millim. ¢ 9. | 
Var. thoracis disco nigro-fusco. 9. 
Hab. Mexico, Cordova,. Tuxtla (Sad/é). 
Head yellow beneath and in front, the crown dull black ; prothorax im the male a 
little longer than wide, usually with a wide depression in the centre of the base, some- 
times with small discoidal spots; in the female quadrate, and with the disk sometimes 
black, at other times yellow with the lateral depressions infuscate. Scutellum brownish, 
with yellow apex.. Elytra short and acuminate, leaving quite one third of the apex 
uncovered; the suture and margin yellow, the apex more widely so, their bases some- 
times yellow, but rarely so. The apical valve in the male slightly infuscate. 
This species is very like what I have received from Texas as “marginatus, Fab.,” 
L 2 
