SCOLOCHRUS. 135 
pygidium flavous; the underside more or less fulvous, the sides of the abdomen, and a spot near the apex 
of the femora, yellowish-white ; prosternum flat, broadly rounded posteriorly. 
Hab. Panama, Volcan de Chiriqui (Champion). 
This species may be easily distinguished by its curious sculpture, something like that 
of several species of Pachybrachys (from which genus the differently-shaped prosternum 
separates it), and its pale general coloration and small size. All the specimens obtained 
seem to be females; the male probably has the eyes contiguous. One example differs 
from the others in having deep black and partly confluent punctured striz, the stric 
forming dark bands and surrounding the smooth yellow spaces. The apical portion 
of the elytra for some distance upwards is smooth, and interrupted only by the joined 
ends of the subsutural and sublateral punctured strie. In some specimens the fulvous 
colour of the elytra is much more extended, the flavous spots being thus greatly 
reduced in size. 
31. Scolochrus quadrimaculatus. (Tab. XX XVIII. fig. 22.) 
Black, some spots on the head, the labrum, and the lateral margin of the thorax yellow; thorax rugose- 
punctate ; elytra closely punctate-striate at the sides, black, a large subquadrate humeral, and a round 
apical spot, yellow; three spots on the pygidium, the sides of the abdomen, and part of the femora, 
yellow. 
Length 2 lines. 
Head closely punctured, black, a small spot on each side of the vertex, the indented portion of the eyes, a Spot 
at the middle, and the labrum, flavous; antenne black, the lower five joints fulvous; thorax rather more 
than twice as broad as long, the sides evenly rounded at the middle, but slightly narrowed at the base 
and apex, the disc with an oblique obsolete depression on each side, closely and rather strongly rugose- 
punctate, black, the lateral margins narrowly flavous; scutellum black; elytra rather flattened on the 
dise, scarcely more strongly punctured than the thorax, the punctuation irregular near the suture, but 
arranged in close rows on the rest of the surface, the interstices scarcely raised, finely wrinkled, and but 
little shining, the surface black, a humeral spot not extending to the suture, and a round apical spot, 
bright flavous; below black, the anterior coxs, a spot in front and a streak at the sides of the breast, the 
sides of the abdomen, and the greater part of the four posterior femora beneath, yellow, the base of the 
tibie also more or less flavous ; prosternum with the apical margin yellow, and broadly rounded. 
Hab. Mexico, Juquila (Sallé). A single specimen. 
This species would doubtless have been included by Suffrian in the genus Metallactus ; 
but for reasons already stated I prefer to place all the allied Central-American forms in 
the one genus Scolochrus. Several of Suffrian’s species of Metallactus approach the 
present insect very closely, though none of them come near enough to be identified 
with it. Of these WM. lubricus is, perhaps, nearest allied to 8. guadrimaculatus; the 
latter differs from IM. lubricus, however, in the thorax being rugosely punctured, in 
the elytra being distinctly punctured nearly to the apex (instead of having 
the punctures almost obsolete below the middle), and in the pygidium being black, 
with yellow (not white) spots. 
