RHYSSOMATUS. 327 
6". Prothorax not tuberculate at the sides. 
a®, Prothorax conical, rapidly narrowing from the base . . Species 5-9. 
6°. Prothorax somewhat rounded at the sides anteriorly, 
more gradually narrowing from the base . . . . . Species 10-15. 
6°. Anterior cox widely separated ; prothorax obliquely strigose . Species 16. 
b*. Alternate elytral interstices costate from about the middle to the 
apex. 
. Prothorax with the disc obliquely strigose. . . . . . + . Species 17.- 
re Prothorax with the disc punctate. . . . 2 fe Species 18. 
. All the elytral interstices narrowly costate ; prothorax obliquely 
strigose . . . . . . . . . . Species 19. 
b’’, Eyes widely separated ; prothorax obliquely strigose elytral inter- 
stices convex throughout. . . . . . oo. . . « « Species 20. 
bY. _ Rostrum distinctly depressed at the base above, strongly curved. 
‘, Eyes narrowly or moderately separated ; elytra with some or all of 
the interstices costate from about the middle to the apex ; prothorax 
with the disc punctate. 
da‘, Rostrum moderately slender; tibial claw long . . . . . . ~ Species 21. 
e*. Rostrum very slender, shining; tibial claw shorter. . . . . . Species 22. 
d’’’, Eyes widely separated. 
f'. Elytral interstices costate from about the middle to the apex; 
prothorax obliquely strigose. . . . . Species 23. 
g*. Elytral interstices flat and densely punctate, like the prothorax ; 
rostrum slender. . . .. . Loe, . . » « « Species 24. 
b. Intermediate and posterior tibiz straight on their outer edge ; tarsal claws 
subapproximate, the inner tooth not easily seen; janterior cox widely 
separated; prothorax simply punctate ; antenne (?) inserted far behind 
the middle of the rostrum ; body shining. 
. . Elytral interstices alternately costate posteriorly . . . . . . « Species 25. 
’. Elytral interstices 3 very sharply, and 4-9 more teebly, costate 
posteriorly . . 2... ew ee ee ew ee ee ee ee) «Species 26. 
e’. Elytral interstices each becoming convex posteriorly . . . . . . « Species 27. 
1. Rhyssomatus rugosus, sp.n. (Tab. XVII. figg. 14, 144,3; 146, interm. 
tibia.) 
Oblong, moderately shining, piceous, very sparsely and finely pubescent. Head densely, rugulosely punctate, 
the eyes separated by a space equalling nearly half the width of the rostrum; the latter exceedingly 
stout, slightly longer than the prothorax, feebly curved, densely, rugosely punctate, and carinate down 
the centre, the antenna inserted far before the middle. Prothorax transverse, slightly rounded at the 
sides, narrowing from the base, which is strongly bisinuate, not constricted in front ; closely, shallowly, 
obliquely strigose, and with indications of a smooth median line. Elytra wider than the prothorax, 
subparallel in their basal half, strongly sinuate at the base, the humeri not prominent laterally ; punctato- 
sulcate, the punctures distant one from another, the interstices almost flat and densely rugose throughout. 
Anterior cox narrowly separated. Legs stout; tibize widened internally from about the middle to the 
tip, the intermediate and posterior pairs angulate on their outer edge and ciliate thence to the apex. 
Length 63, breadth 375 millim. (¢.) 
