by C. N. Barker. 171 
I fully recognise the undesirability in classification of relying on 
sexual characters alone in the determination of species, of which the 
general facies is so similar as in that of C. bertolonii, Horn, race 
Jasciculicornis, Mihi, and the true clathrata of Dejean. 
Distribution and habits are in such relationships of great importance, 
and further on I propose to provide some data on this subject. First 
I will refer to some minor points which will aid identification—C. 
bertolonit, Horn, race fasciculicornis, Mihi, differs from C. brevicollis, 
Wied. race clathrata, Dej. as follows :— 
(1) The labrum is longer; more sub-triangularly produced (especially 
in the females*). 
(2) The joints of the antenne are a little shorter, and the 5th is 
shorter in relation to the 4th. 
(3) The elytra are linear and parallel in both sexes ; the females of 
clathrata are always more or less explanate beyond middle and the 
humeral angles more declivous. 
These points of difference are very slight and, unfortunately, are not 
always strictly reliable, for they are subject to some modifications 
according to their geographical distribution. There appears to be 
considerable correlation between the various parts of the structure. 
Thus, with elongation of prothorax and elytra there is generally an 
equivalent elongation of the antenne and labrum, and as a whole the 
South-east African types are more linear than the western. Per 
exemplum, the labrum and antenne of typical berto/onii are more 
elongate than in its sub-sp. fasciculicornis. It must be admitted that 
it is not always possible, without the help of locality labels, to 
determine the females of clathrata from fasciculicornis, but fortunately 
the two forms, to the best of my knowledge, do not occur within near 
proximity to one another, each having its well defined geographical 
limits. I make this assertion confidently on the strength of the 
considerable mass of material, from all parts of S. Africa, that I have 
had under review, for which I am indebted to the courtesy of the 
directors of S. African museums and other correspondents. 
C’. bertolona, Horn appears to be limited to the Eastern and North- 
eastern areas from Inhambane northwards. It only differs from its 
widely distributed sub-species in its larger, slightly more elongate form 
and in the elytral pattern which, in very variable degrees, shows a 
disposition to the separation, attenuation or evanescence of the bands 
and rami that compose it. Examples from Inhambane and Beira are 
extreme forms in which the rami of the pattern are in some cases 
reduced to mere dentitions. 
* The labrum is invariably more developed in the female than in the male 
sex among all the forms of the group. 
