232 HETEROMERA. 
Var. The elytra more finely and more uniformly punctured, the punctuation becoming very little coarser 
towards the base. 
Hab. GUATEMALA, near the city, San J oaquin (Champion). 
The typical form was found in plenty by Herr Hoge at Acapulco on the Pacific 
coast, and the variety in equal numbers by myself in the vicinity of the city of 
Guatemala. A single specimen from San Joaquin is somewhat intermediate, and some 
of the Acapulco examples are more finely punctured than others, so that I am quite 
unable to distinguish more than one species. A. occidentalis is almost intermediate 
between A. obscurus, La Ferté, and A. nitidulus, Lec. ; but in the sculpture of the 
head and the shallow post-basal depression of the elytra it approaches more nearly to 
A. obscurus. The antenne are testaceous, with the three or four apical joints, at most, 
infuscate ; the elytra are less minutely and more sparsely punctured than in J. obscurus, 
finely and uniformly pubescent, and rather depressed. The head is much smoother 
than in A. nitidulus, and more transverse than in A. asphaltinus. The elytral punc- 
tuation is finer and more diffuse, and the pubescence is sparser than in A. punctipennis. 
The head and thorax have a brassy lustre in some of the Guatemalan specimens. 
A. occidentalis averages smaller in size than A. nitidulus. 
15. Anthicus aterrimus. 
Elongate, black, very shining, finely and very sparsely pubescent, the pubescence on the basal portion of the 
elytra denser and ashy in colour. Head strongly transverse, a little rounded at the sides behind, sparsely 
and minutely punctured, the eyes large and prominent; antenne long, piceous, the four or five basal 
joints reddish-testaceous; prothorax much longer than broad, very convex, the sides very strongly con- 
stricted behind the middle and thence to the base almost straight, the anterior portion transversely convex, 
the posterior portion cylindrical, the flanks very deeply excavated, the base distinctly margined, the 
surface sparsely and minutely punctured ; elytra long, widest at the middle, subparallel in front, with a 
rather deep post-basal depression and moderately convex beyond this, the humeri somewhat prominent, 
the surface sparsely and very minutely punctured, the punctuation closer and more distinct at the base, 
the pubescence transversely arranged in the depressed part; legs piceous, the femora testaceous at the 
base, the latter clavate; fifth ventral segment truncate, and the hind tibie rather stout and strongly 
sinuous within, in the male. 
Length 24 millim. (<¢.) 
Hab. Guatemaa, El Tumbador 2500 feet (Champion). 
Two examples, both males, from the Pacific slope of Guatemala. This species 
resembles the Colombian A. ebeninus, La Ferté, in its very shining black colour and 
comparatively smooth surface ; it differs from that insect (the types of which I have 
examined) in the longer thorax and the much deeper post-basal depression of the 
elytra; the hind tibie are stouter and more sinuous within, and the fifth ventral 
segment is unimpressed, in the male. The short, transverse head and the sparse and 
minute punctuation of the upper surface separate it from A. asphaltinus ; the sparser 
punctuation of the thorax and elytra, the deeper post-basal depression of the latter, 
and the more shining surface distinguish it from A. obscurus, A. occidentalis, &c. 
