136 Mr. F. P. Pascoe on the Colydiidx 
portion as broad as the corresponding coste of the anterior portion, 
the sulci between them smooth and shining; scutellum punctiform ; 
elytra elongate-ovate, broadly sulcated, the sulcations with a double 
row of strong punctures, the interstices sharply raised; body beneath 
chestnut-brown, with large, crowded, shallow punctures, each furnished 
with a greyish seta; palpi pale ferruginous, Length 13 line. 
The principal differences between this species and Machlotes por- 
catus (ante, p. 36) are, that in the latter the posterior portion of the 
two intermediate costa is contracted, so as to form a sort of bifid or 
bilobed tubercle, the coste being also much narrower and the 
intervals between them opaque, and the single row of squarish 
punctures pitting the sulcations on the elytra. My specimen is the 
only one I have seen. 
Bothrideres marginatus. 
B. elongato-ovatus, fuscus, subopacus; prothorace reticulato-punctato, 
disco linea parallelogrammum includente impressa, lateribus canali-< 
culatis. 
Hab. Sarawak. 
Elongate-ovate, dark brown, subopaque; head convex in front, 
closely punctured; prothorax about equal in length and breadth, 
rounded at the sides, contracted posteriorly, very closely punctured, 
the punctures rather large and having a reticulated appearance, the 
disk with an impressed line, including a squarish space, and opening 
out into three short canals posteriorly, a narrow groove on each side 
near the margin; scutellum small, triangular; elytra with five raised 
lines on each, the intervals with two lines of punctured strive; body 
beneath dark brown, coarsely punctured on the sterna, more finely and 
remotely on the abdomen; antennz and legs dark brown; palpi in- 
clining to testaceous. Length 23 lines. 
The impressed line including a parallelogrammical space on the 
prothorax, and the reticulated appearance caused by the closely-set 
punctures around it will readily distinguish this species, which 
otherwise has a considerable resemblance to Bothrideres dllusus, 
Newm., an Australian form. 
Bothrideres insularis. 
B. subangustus, fusco-castaneus, nitidus ; prothorace subtilissime punc- 
tato, disco linea parallelogrammum includente impressa, lateribus mar- 
ginatis. 
Hab. Mysol. 
Rather narrowly oblong, dark chestnut, shining; head convex in 
front, moderately punctured; prothorax about equal in length and 
breadth, the sides rounded, and contracted behind, minutely punctured, 
