MICROTONUS. 115 
Two specimens. This species is allied to M. sericans, Lec., from which it differs in 
its narrower shape, much more coarsely punctured surface, shallow frontal groove, and 
unimpressed and differently-shaped thorax. 
3. Microtonus pilosus. 
Elongate, rather narrow, convex, subopaque, dull brown, the head reddish, the entire upper surface densely 
and somewhat roughly punctured and clothed with rather long appressed ashy pubescence. Head with 
the transverse frontal suture shallow, the apical joint of the maxillary palpi piceous; eyes small, very 
widely separated, black; antenne piceo-testaceous, joints 2 and 3 testaceous; prothorax transverse, 
unimpressed, very little narrowed anteriorly, the sides rounded in front and sinuate behind, the hind 
angles acute; elytra comparatively elongate; beneath piceous, densely and coarsely punctured and 
pubescent ; legs testaceous, the femora and the apices of the tibie piceous, the first joint of the hind tarsi 
very little longer than the following joints united. 
Length 33 millim. 
Hab. GuatTeMALA, Quiche Mountains 8000 feet (Champion). 
One specimen, apparently a female. This species differs from M. gracilis and 
M. sericans in its very much smaller, more transverse, and more widely separated eyes, 
and much longer pubescence; the thorax is less narrowed in front than in M. gracilis 
(thus resembling J. sericans), and the first joint of the hind tarsi is shorter. 
4, Microtonus nitidulus. (Tab. V. fig. 16.) 
Elongate, shining, piceous or brownish-piceous, the entire upper surface thickly and rather coarsely punctured 
and sparsely clothed with long appressed ashy pubescence. Head without distinct transverse frontal 
suture, the eyes small and very widely separated in both sexes, the palpi and antennez piceous; prothorax 
transverse, narrowed in front, the sides rounded anteriorly and strongly sinuate behind, the hind angles 
acute, the surface not so closely punctured as that of the head, an ill-defined longitudinal space on the middle 
of the disc impunctate ; elytra very long, each with a large shallow oblique impression below the base and 
a much shallower oblong one near the suture about the middle (the latter sometimes indistinct), the 
punctures more scattered than on the prothorax and becoming a little finer and shallower towards the apex ; 
beneath closely punctured and pubescent; legs very long, piceous, the basal two-thirds of the tibie and 
the first joint of the hind tarsi more or less testaceous, the latter as long as the following joints united. 
Length 32-53 millim. (¢ 9.) 
Hab. Guatemata, Totonicapam 9000 to 10,000 feet (Champion). 
Four examples. This insect differs from the type of the genus, M/. sericans, in the 
smaller and more transverse eyes, impressed elytra, shining and more sparsely punctured 
surface, coarser pubescence, longer legs, and almost obsolete frontal suture. J. pilosus 
is, however, intermediate between the two. 
5. Microtonus elongatus. (Tab. V. fig. 17, ¢.) 
Very elongate, narrow, subfusiform, subopaque ; varying in colour from testaceous with the head and prothorax 
reddish and the elytral suture a little darker, to piceous with a testaceous stripe on each elytron extending 
from the shoulder to the apex; the entire upper surface densely and coarsely (the head and prothorax 
rugosely) punctured, and clothed with fine, short, appressed pubescence. Head without distinct transverse 
frontal suture, the eyes moderately large, smaller and more distant in the female, the antenne varying 
in colour from piceo-testaceous to testaceous ; prothorax convex, almost as long as broad, the sides nearly 
QQ 2 
