106 HETEROMERA. 
an oblique groove extending inwards, the surface coarsely, closely, and irregularly punctured, the punctures 
longitudinally or sinuously confluent, a longitudinal space down the middle of the disc impunctate; scu- 
tellum densely punctured ; elytra with rows of coarse punctures, the punctures becoming very much finer 
on the apical third ; beneath closely and rather coarsely punctured ; legs more or less testaceous. 
Length 23-32 millim. 
Hab. Mexico, Jalapa, Cerro de Plumas (Hége). 
Var. a. Head and prothorax usually of a more reddish tint; the latter with the punctures less confluent and 
in some examples quite separate from each other; the elytra marked as in the type. 
Hab. Guatemaua, San Juan in Vera Paz (Champion); Panama, Bugaba, Volcan de 
Chiriqui (Champion). | 
Var. b. The elytra with a narrow transverse flavo-testaceous band below the base (not reaching the suture), 
the second spot not indicated ; the punctures on the prothorax more or less confluent, but not so coarse 
as in the type; the legs rather darker, the femora in one example stained with piceous. 
Hab. Guatemata, Cerro Zunil (Champion). 
Numerous examples of the type and of the var. a, four only of the var. 6. In the 
long series of specimens the extreme forms of this variable insect are connected by inter- 
mediate examples; and they cannot be regarded as more than local races of one species. 
The teeth at the side of the thorax are sharper in some examples than in others (but 
they are never so strong as in S. setosus), the hinder one being sometimes very promi- 
nent; occasionally they are in part obsolete. The punctures on the elytra are placed 
in much more regular rows than in 9. setosus, and the rows are distinct to beyond the 
middle. S&. maculatus is also much smaller and less elongate than S. setosus; it some- 
what resembles Lissodema denticolle, Gyll., an insect inhabiting Northern Europe. 
SOSTHENES. 
Last joint of the maxillary palpi ovate, rather broad, obliquely truncated at the apex ; mandibles bifid; mentum 
twice as broad as long; head very broad, short, rather convex, deeply sunk into the prothorax, not rostrate 
in front, the epistoma very short and limited behind by a transverse groove, the labrum prominent; eyes 
convex, prominent, rather large; antenne moderately stout, short, not reaching the base of the prothorax, 
11-jointed—1 stout, ovate, 2 shorter and more slender than 1, 3 more slender and a little longer than 2, 
obovate, 4-8 gradually decreasing in length and submoniliform, 9 nearly twice as wide as and much longer 
than 8, transverse, 9-11 forming a moderately stout three-jointed club, 10 transverse, 11 ovate and longer 
than 10; prothorax convex, very broad, transverse, narrower at the base than at the apex, the sides 
immarginate, very strongly rounded, and constricted behind, the surface without depressions ; scutellum 
very short, strongly transverse; elytra rather long, considerably wider than the prothorax at the base, 
only a little wider than the latter in its broadest part, broadest about the middle, sparsely punctured ; 
anterior coxe contiguous; intermediate and hind coxe moderately separated ; legs moderately stout, the 
tibiee with distinct spurs, the penultimate joint of all the tarsi small; body winged, glabrous; form 
elongate, subparallel, rather convex. 
This genus contains a single species of small size from Guatemala. 
Sosthenes is closely allied to Salpingus, but differs from it in the head and thorax 
being broader; the head is shorter, non-rostrate in front, more convex behind, and 
