GERAUS. 295 
rostrum more curved, the vestiture of the under surface sparser and finer, the pro- 
sternum without trace of prominences. The vestiture of the rest of the upper surface 
is whitish, shading off into ochreous in places, and that of the elytra is coarse. 
70. Gerzeus decemlineatus, sp. n. (Tab. XVI. figg. 5, 5a, b, 3.) 
Oblong-rhomboidal, shining, black (the legs ferruginous in one immature specimen); the prothorax with 
a median vitta and a space along the sides, the scutellum, the alternate elytral interstices, and the entire 
under surface, thickly clothed with white scales, the rest of the vestiture of the upper surface sparse, 
blackish-brown, that of the rostrum and legs white. Head finely punctate; rostrum arcuate, longer 
than the head and prothorax, thickened towards the base, closely punctate and feebly carinate,—the 
apical portion in the Q more slender, longer, smoother, and flattened,—the antenne inserted at ( 2) or 
beyond ( d) the middle, the antennal club oblong-ovate. Prothorax short, conical, feebly constricted in 
front; densely, finely punctate. Scutellum squamose. Elytra much wider than the prothorax, long, 
narrowing from the base ; deeply punctate-striate, the interstices rugulosely punctate. Beneath densely, 
finely punctate; ventral segments 1 and 2 slightly depressed down the middle. Prosternum unimpressed. 
Anterior coxe narrowly separated. Legs rather long and slender. 
$. Anterior tibie curved, strongly unguiculate, hollowed on the inner side from about the basal third to 
near the tip. 
Length 32-44, breadth 14-2 millim. (¢ Q.) 
Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith). 
Three males and one female. This is one of many interesting new forms found by 
Mr. Smith at Omilteme. It is readily distinguishable by its long, albo-lineate elytra, 
short, conical, trivittate prothorax, &c. 
71. Gerzeus omiltema, sp.n. (Tab. XVI. figg. 6, 6a, 2.) 
Elongate-rhomboidal, flattened above, black, the tarsi ferruginous at the base ; thickly clothed with 
small scales, which are whitish on the median lobe of the prothorax, on the scutellum, along the 
suture, and on the fifth elytral interstice posteriorly, and brown on the rest of the upper surface ; the 
under surface albo-squamose. Head closely punctate; rostrum stout, arcuate, slightly longer than the 
head and prothorax, sparsely, finely punctate, the antenne inserted at a little beyond the middle, the 
outer joints of the funiculus strongly transverse, the club short and stout. Prothorax transverse, rounded 
at the sides, narrowed and feebly constricted in front; densely, finely punctate. Scutellum rather large, 
densely squamose. Elytra considerably wider than the prothorax, elongate-triangular ; finely punctate- 
striate, the interstices flat and densely, rugulosely punctate. Beneath densely punctate. Prosternum 
shallowly but sharply sulcate anteriorly, the sulcus limited on each side by a short straight ridge. 
Anterior coxe separated by about half their width. Metathoracic episterna very broad. Legs moderately 
long; tibize each with a slender uncus at the tip. 
Length 4, breadth 13 millim. (@.) 
Hab. Mexico, Omilteme in Guerrero 8000 feet (4. 4. Smith). 
One specimen. Very like Pseudogerwus macropterus, but more flattened above, the 
mandibles straight on their inner edge, the prosternum sulcate anteriorly, the meta- 
thoracic episterna much broader, the scutellum larger, the elytral interstices densely 
rugulose, the sinuous interspaces on the prothorax not longitudinally confluent. The 
antennal club is short. 
