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a species. I suspect however that this is more apparent than 
real as the mentum when the insect has its mouth open is more 
prominent than if the mouth be closed; this point could be 
cleared up only by dissecting a number of conspecific examples, 
but unfortunately these species are rare and I have not yet re- 
ceived or collected any in sufficient numbers for the purpose. But 
at any rate within the range of species that cannot possibly in 
my opinion be removed generically from A. calvus there is con- 
siderable variety in the mouth organs and especially in the men- 
tum, some having the mentum only gently convex (as is the case 
with A. calvus) and others having it quite strongly compressed 
and even carinate down the middle line; in A. calvus the hind 
part is gently concave down the middle, the concavity however 
ceasing in the front part which is entirely convex. In 
Corynophyllus (as far as my observations go) the mentum is in- 
variably flat (or at any rate notably less convex than in any 
Aneurystypus) and I think this is a reliable distinction between 
the genera which (as I have already pointed out) are also dis- 
tinguishable inter se by the form of the antennal club, the joints 
of which are in Aneurystypus narrow elongate and parallel while 
in Corynophyllus the corresponding joints are much wider and 
are ovate in form. Teinogenys must be very near to 
Aneurystypus but no doubt differs as the described species are 
evidently quite unlike the described Aneurystypi as species. I 
have not an authentic type of Zeinogenys and therefore do not 
feel able to speak authoritatively about it though I have little 
doubt I know it. 
The following tabulated statement will show distinctive 
characters for the six described species of this genus :— 
A. Antennal club very long,—more than half agaia 
as long as the rest of the joints together. 
B. Front of prothorax armed with a strong 
tubercle. 
C. Clypeus subvertical .. calvus, Blackb. 
CC. Clypeus nearly continuous in direction with 
the rest of the head ... Bee .. aurileguus, Blackb. 
BB. Front of prothorax unarmed. 
C. Clypeal suture carinate, armed with a strong 
median tubercle ... metallicola, Blackb. 
CC. Clypeal suture feebly defined, unarmed... collaris, Blackb. 
AA. Antennal club much shorter. 
B. Clypeus subvertical, narrow dives, Blackb. 
BB. Clypeus much wider nearly continuing the 
plane of the rest of the head _... ... Richardse, Blackb. 
A. aurilegulus, sp. nov. Mas. Castaneus ; pubus dense longe 
fulvo-hirsutus ; clypeo (hoc subhorizontali) squamose, ver- 
tice rugulose, prothorace sparsius minus subtiliter, scutello 
subtilius inequaliter, pygidio sparsissime (ad latera sat 
crebre) punctulatis; elytris puncturarum seriebus circiter 
