114 HETEROMERA. 
Eyes smaller and more transverse; frontal suture indistinct ; pubescence 
longer and coarser. 
Surface opaque; elytra unimpressed. . . . . - « « « © . pilosus. 
Surface shining ; elytra with distinct impressions . . . . . . nitidulus. 
Body very elongate, more or less fusiform; eyes moderate in size; surface 
subopaque or slightly shining. | 
Pubescence short and fine; sides of the thorax straight behind, the hind 
angles rectangular . . . 2. 1. 1 6 6 ew we ee es ) Clongatus. 
Pubescence longer and coarser; sides of the thorax converging from the 
base, the hind angles acute and extending outwards. . . . . fusiformis. 
1. Microtonus figuratus. (Tab. V. fig. 14, 2.) 
Moderately elongate, comparatively broad, opaque ; brownish-black, the head and the sides and base of the pro- 
thorax (broadly) reddish, the elytra each with a large transverse brownish-testaceous patch (angulate on 
its lower edge and with a branch extending upwards) below the base, not quite reaching the suture and 
enclosing an oblong spot, and an oblique stripe beyond the middle, this stripe confluent with the opposite 
one at the suture, extending along the latter towards the apex, and in front connected with the transverse 
patch ; the entire upper surface very densely and uniformly punctured and clothed with short ashy pubes- 
cence, the elytra bare in places and with the pubescence assuming the form of stripes or spots. Head 
with well-defined transverse frontal suture, the eyes comparatively large, the antenne and palpi testaceous ; 
prothorax transverse, unimpressed, the sides converging from the base, rounded in front, and sinuate 
behind, the hind angles acute; elytra comparatively broad, rather short; beneath piceous, densely and 
somewhat coarsely punctured and pubescent ; legs piceous-brown, the tarsi testaceous, the first joint of 
the hind tarsi longer than the following joints united. 
Length 33 millim. (¢.) 
Hab. Mexico, Jalapa (Hége). 
One male example. This elegantly-marked little insect closely agrees with M. sericans, 
Lec., in its general structure ; but differs in the thorax being less quadrate, and in the 
elytra being comparatively broader and spotted and with the pubescence variegate. At 
first sight, the pubescence appears to be abraded; but this is not the case, the arrange- 
ment being exactly similar on each elytron. The punctuation of the elytra is very dense 
and regular, and the minute interspaces have a somewhat granular appearance ; the 
markings are difficult to describe and they will be best understood from our figure. 
2. Microtonus gracilis. (Tab. V. fig. 15, 2.) 
Elongate, narrow, convex, opaque, piceous-brown, the head reddish, the entire upper surface densely and 
coarsely punctured, the head and prothorax rugosely so, and clothed with short silky pubescence. Head 
with the transverse frontal suture shallow, the epistoma short, the eyes comparatively large and more 
widely separated in the female than in the male, the antenne and palpi testaceous ; prothorax transverse, 
narrowing from the base, the sides feebly sinuate behind and rounded in front, the hind angles acute, the 
surface quite unimpressed; elytra less rugosely punctured than the head and prothorax and not so dull ; 
beneath piceous, densely and coarsely punctured and pubescent ; legs very slender, testaceous, the femora 
a little darker, the first joint of the hind tarsi much longer than the following joints united ; sixth ventral 
segment in the male furnished on each side with a long spatulate appendage. 
Length 23-22 millim. (¢ 2.) 
Hab. Guatema.a, San Gerénimo 3000 feet (Champion). 
