NEMOSOMA.—CYLIDRELLA. 389 
Head large, elongate, deflexed, subincrassate in front and depressed along the 
middle, rather coarsely, moderately closely punctate. Thorax smaller than the head, 
finely margined at the base and sides, the lateral margin quite disappearing before 
reaching the front margin, the sides narrowed behind the middle to the base, the hind 
angles very obtuse, the surface punctured like the head. Elytra narrow and elongate, 
shining, brassy, each with a large pallid mark extending backwards from the shoulder 
and curving inwards towards the suture, and also with a large transverse spot just 
behind the middle; they are rather coarsely and irregularly, subseriately punctate. 
Legs slender, pale red. Seven specimens. 
CYLIDRELLA, gen. nov. 
Corpus parvum, lineare ; abdomine elongato, segmentis quatuor ab elytris haud obtectis. 
The little insect for which this name is proposed has more the appearance of a 
minute species of Cylidrus—an aberrant genus of Cleride—than of any Trogositid 
known as yet; nevertheless, although I have only one example for study, I have no 
doubt that its systematic affinities are with Memosoma. The head is elongate, produced 
in front into a free, bilobed process overhanging the base of the mandibles. The eyes 
are moderate in size, subcircular, not prominent, finely faceted. The antenne are 
apparently 10-jointed, but the funiculus is ill-developed and its joints not easy to 
count: the basal joint is free, moderately large, 2nd joint much smaller, 3-7 small, 
8-10 forming an elongate club, the 8th and 9th rather transverse, 10th subcircular. 
Labrum not distinct; mandibles large and prominent, directed downwards. Palpi 
small; terminal joint of the maxillary pair small, acute, but with the apex minutely 
truncate. Labium concealed. Prosternum greatly compressed between the coxe, which 
are large and extend to the sides of the thorax; middle and hind coxe contiguous. 
Hind-body elongate, with six ventral segments, the basal five subequal, the terminal 
one smaller. Legs slender; the front and middle tibie denticulate externally, without 
terminal spurs; tarsi filiform and slender, their joints difficult to count, but apparently 
five in number, the basal one short and concealed. 
1. Cylidrella mollis, sp.n. (Tab. XII. fig. 23.) 
Elongata, subcylindrica, angusta, nigra, elytris abbreviatis in medio sordide albidis, tarsis antennarumque basi 
testaceis. 
Long. 3} millim. 
Hab. Guatemaa, Cerro Zunil (Champion). 
Antenne short, joints 1-7 sordid yellow, the club nearly black. Head very elon- 
gate, deflexed towards the front, and canaliculate on the anterior part; sparingly 
punctate. Thorax long and narrow, a little narrowed behind, without raised margins, 
shining black, sparingly punctate. Elytra covering only about half of the elongate 
