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XYLEBORUS. 
195 
margin at most with a median group of tubercles; body relatively larger and more robust, 
winged. 
Males. 
. Base of the prothorax raised in the middle 
Base of the prothorax not raised Loe 
Elytra with one large spine on each side of the apical i impression 
Elytra with several small spines on each side of the impression 
. Prothorax produced over the head into a transverse plate 
Prothorax not produced into a plate 
Anterior margin of the prothorax entire . 
Anterior margin of the prothorax trilobate toe, 
Prothorax slightly depressed in front, without a median tooth 
Prothorax impressed in front, with a median apical tooth 
Females. 
. Prothorax subgiobose or ellipsoid, broadly rounded in front from behind 
the middle, not longer than broad (except in X. evaratus and 
X. interpunctatus,in which, however, the discal elevation is distinctly 
postmedian) So . 
Prothorax subrectangular, the sides and apex separately and obtusely 
rounded, the auterior angles therefore evident . 
Prothorax cylindric, oblong, strongly rounded at the apex, ‘the sides 
’ posteriorly subparallel, the discal elevation median or ante-median 
Declivity of elytra retuse or excavate . 
Declivity convex, at most slightly flattened . 
. Prothorax with a median group of prominent tubercles on the apical 
’ border . . Coe 
Prothorax uniformly rounded i in front 
. Elytral excavation with a single large spine on each side 
Excavation with several small spines on each side 
. The spine situate at the upper part of the lateral callus ; prothorax 
black ; ee ee 
The spine situate in the middle of the later al callus; prothorax rufous . 
. Elytral spines cylindric, obtuse . 
Elytral spines conical, acute . 
. Elytral interstices with fine uniseriate punctures ; fundus of the excava- 
tion not tuberculate . oo ee oe . 
Interstices multipunctate ; fundus of the excavation tuberculate . 
. Apex of the elytra with four acute spines 
Apex of the elytra without spines . 
. Elytral spines very long, the lower pair less than their length apart, 
Elytral spines short, the lower pair more than their length apart. 
2. 
3. 
celebs, sp. n. 
Saivini, Sp. D. 
4., 
5- 
monachus, sp. D. 
spathipennis, Eichh. 
spinulosus, sp. 0. 
affinis, Kichh. 
salvini, sp. n. 
6. 
sanguinicollis, sp. n. 
godmani, sp. n. 
sharpi, sp. n. 
8. 
horridus, Eichh, 
9. 
squamulatus, EKichh, 
ferox, sp. n. 
spinulosus, sp. n. 
2CC 2 
