80 CATALOGUE OF 
+ Fore femora slender, with some little spines. - |§HysLocnrius. 
+-++ Fore femora thick, with one stout spine. -  TRAPEZONOTUS. 
coro First joint of the hind tarsi almost twice or thrice 
longer than the second and third joints 
together. 
+ Fore border of the prothorax straight, with an 
abbreviated neck. - -  IscHNoTarsvs. 
+-++ Fore border of the prothorax excavate: rarely 
straight. 
= First joint of the rostrum shorter than the head. - Microroma. 
== First joint of the rostrum as long as the head, or 
somewhat longer. 
© Fore femora beset only on the inner edge of the 
fore half with one stout spine and with some 
little spines. 
V_ Rostrum extending to the hind border of the 
metapectus. First joint of the hind tarsi thrice 
as long as the second and third joints together. LetHzus. 
VV Rostrum extending to the hind border of the 
mesopectus. First joint of the hind tarsi twice 
as lung as the second and third joints 
together. - - - Ruy PaROCHROMUB, 
OO Fore femora beset with spines of equal size along 
the whole inner edge. 
V Prothorax short, trapeziform. 
A Outer edge of the fore femora beset with three or 
four spines. - - - - - Beosvs. 
AA Outer edge of the fore femora beset with six or 
eight spines. 
> Rostrum extending to the middle of the meso- 
pectus. - Gontranoros. 
>> Rostrum extending to the paddle of the metas 
pectus. - - - - - EmBLETHIs. 
VV Prothorax elongate, trapeziform. 
A. First joint of the antenne longer than the fore 
part of the head. First joint of the hind tarsi 
thrice as long as the second and third joints 
together. - - - - - TSCHNOPEZA. 
AA First joint of the antenne as long as the fore part 
of the head. First joint of the hind tarsi twice 
as long as the second and third together. -  Negvurocrapus. 
tt First joint of the hind tarsi shorter than the 
second and third joints together. 
§ Rostrum extending to the base of the abdomen. - IscaNORHYNCHUB. 
§§ Rostrum not extending beyond the middle of the 
mesopectus, 
x Eyes small. - - - - - ARTHENEIS. 
x xX Eyes large. - - - - -  Hotcocranum. 
++ Hooks on the inner veins. Veins of the membrane 
springing from the basal areolets. 
t Prothorax elongate, trapeziform. - - PuyGaDicus. 
