SYPHREA.—CACOSCELIS. 273 
widened posteriorly but subcylindrical and parallel, and devoid of any basal depression, 
their punctuation being either very close and fine or nearly obsolete. The underside 
and legs are usually bluish-black or piceous, but in one specimen the legs are obscure 
fulvous. 
EXOCERAS. (To follow the genus Syphrea, p. 302.) 
Body oblong; antenne very elongate, the first joint as long as the following three joints together; palpi 
slender ; frontal tubercles very strongly raised, divided by a central groove; the lower portion of the face 
flattened, deflexed ; the clypeus strongly raised, its apex forming an angle with the face; thorax sub- 
quadrate, deeply transversely grooved near the base, the groove extending to the sides; elytra punctate- 
striate; posterior femora moderately thickened; posterior tibie simple, with a small spine; the first 
joint of the posterior tarsi as long as the following two joints together; claws appendiculate; prosternum 
narrow, elongate ; anterior coxal cavities open. 
1. Exoceras facialis. (Tab. XLII. figg. 1; 1a, antenna.) 
Dark fulvous, the head and thorax piceous with an eneous gloss; clypeus raised anteriorly ; antenne as long 
as the body; elytra convex, finely punctate-striate. 
Length 14 line. 
Head impunctate, piceous; antennz as long as the body, piceous, the first joint the longest, the second small, 
the third and fourth each twice as long as the second, the fifth and following joints much longer than the 
fourth ; thorax piceous, with a slight sneous gloss, subquadrate, one half broader than long, the sides 
straight, slightly narrowed towards the base, the anterior angles tuberculiform, the posterior margin with 
a produced rounded lobe, the basal sulcus deep, slightly sinuate, punctured, the rest of the surface entirely 
impunctate; scutellum small, transverse; elytra broader at the base than the thorax, convex, subcylin- 
drical, transversely depressed below the base, fulvous, with a slight metallic greenish gloss, strongly 
punctate-striate, the punctures diminishing in size towards the apex and not closely placed; underside 
and legs dark fulvous. 
Hab. Panama, Volcan de Chiriqui (Champion). 
One example, apparently a male. 
CACOSCELIS (p. 302). 
Cacoscelis scriptipennis (p. 304). . 
To the locality given, add :—Mexico, Ventanas in Durango, Acapulco in Guerrero, 
-Tapachula in Chiapas (Hdge). 
Two specimens obtained at Tapachula agree perfectly with the type; the others have 
_ the thorax fulvous (instead of testaceous) and devoid of any darker markings, and the 
dark stripes of the elytra broader and connected with each other (instead of partially 
interrupted, as in the type). 
7. Cacoscelis varians. 
‘Flavous or fulvous, the antennz (the basal joints excepted), tibie, and tarsi black ; thorax impunctate ; elytra 
finely and closely punctured, black, the lateral and sutural margins flavous. 
BIOL. CENTR.-AMER., Coleopt., Vol. VI. Pt. 1, Suppl., November 1891. Qn 
