182 | HETEROMERA. 
edge, as they are in the males of X. fragilis, &c.; and the elytra are gradually widened 
to about the middle. Several of the preceding species are closely allied to it. 
23. Xylophilus fragilis, (Tab. VIII. figg. 17,4; 17a, hind leg.) 
Moderately elongate, narrow, subparallel, finely pubescent, shining ; fusco-testaceous, the eyes black ; the elytra 
flavo-testaceous, with a fuscous lateral patch (gradually shading off into the ground-colour) about the 
middle and the suture very narrowly infuscate towards the apex. Head moderately large, finely and 
closely punctured; eyes (¢) pubescent, large, occupying the whole of the side of the head (the head very 
narrowly extended behind them), deeply emarginate, somewhat coarsely granulated, narrowly separated ; 
antenne ( ¢ ) long and slender, testaceous, joint 2 globose, about half the length of 3, 3-10 elongate, 3 
longer than 4, 6-8 each as long as 3, 9 and 10 a little shorter and broader, obovate, 11 wider than, and 
nearly twice as long as, 10, ovate, acuminate ; prothorax broader than long, narrower than the head, 
rather convex, subquadrate, the sides a little rounded and converging in front, the surface punctured 
like that of the head, the disc with a smooth raised line in the middle at the base and transversely 
depressed on either side of this; elytra rather long, parallel in their basal half, each with an oblique 
depression below the shoulder, the suture also depressed at the base, the surface finely and closely punc- 
tured (the punctuation not so dense but a little coarser than that of the prothorax); beneath piceous- 
brown ; legs ( ¢ ) long and quite slender (including the femora), testaceous; the hind femora not stouter 
than the others, excavate along their lower edge, the part of the femur on either side of this extended 
and forming a large elongate spoon-shaped appendage which is spongy within and piceous in colour ; the 
tibiee scarcely curved. 
Length 13 milliim. (<¢.) 
Hab. Gvuatemata, San Lucas Toliman 5000 feet ( Champion). 
One example, from the oak-woods in the vicinity of the Lake of Atitlan. Narrower, 
smaller, and more parallel than X. sermaculatus ;.the upper surface, legs, and antenne 
testaceous; the eyes black; the antenne and legs long and quite slender; the elytra 
with an indeterminate fuscous lateral patch. The very peculiar form of the hind 
femora of the male is a striking character in this insect: a somewhat similar structure 
is to be found in Uroplatopsis appendiculata, a species of Lagriide. 
24. Xylophilus bicolor. (Tab. VIII. fig. 18, ¢ .) 
Short and rather broad, finely pubescent, shining; the head and prothorax fusco-testaceous, the eyes black ; 
the scutellum and elytra black, the latter with the base rather broadly flavo-testaceous, this colour not 
quite extending to the suture. Head comparatively small, finely and closely punctured; eyes (3) 
pubescent, rather small, finely granulated, deeply emarginate, widely separated, the head narrowly 
extended on either side behind them and with somewhat prominent hind angles; antenne ( ¢ ) short, 
slender, thickening outwardly, testaceous, joint 2 globose, stout, 3 slender, one third longer than 2, 
4-6 each shorter than 3, subequal, 7-10 stouter and gradually becoming shorter, 10 not much longer 
than broad, 11 stouter than, and about twice as long as, 10, ovate; prothorax rather convex, narrower 
than the head, subquadrate, nearly as long as broad, narrowing a little in front, very closely punctured 
(the punctuation somewhat coarser than that of the head); elytra broad, rather convex, widest about the 
middle, the sides a little rounded, straight in front, the suture depressed at the base, the surface finely 
and closely punctured (the punctuation a little coarser than that of the prothorax) ; beneath black, the 
head and prothorax testaceous; legs ( ¢ ) moderately long, testaceous, the hind femora darker; all the 
femora slender, the hind pair grooved on the inner edge, the part of the femur on either side of this a 
little extended and piceous in colour (the lower edge projecting a little, and the femora apparently sub- 
angularly dilated near the apex); the tibie almost straight. 
Length 1§ millim. (<¢.) 
