( cxxxiii ) 



Staphylinus enjthropterus, L., 



shows the same lateral sclerites equally well, both of these 

 are quite typical of their genera. 



Achenium depressum, Grav., 



has the terminal segment excavated above and below, 

 whilst the laterals are developed into the hooks already 

 referred to; the hook is very definite, but it forms an un- 

 interrupted part of the end segment and is not articulated. 

 Above each hook is a small cone-shaped, shortly pilose sclerite, 

 which would] appear to be sensory in function. The same 

 formation of lateral hooks, together with sensory sclerites, is 

 found in the genus Othius and may be well seen in fulvipennis, 

 Fab. 



I have only time and space to refer to one genus in the 

 Clavicomia : — 



Silpha laemjala, Fab. 



The aedoeagus of this species would appear to be a beautiful 

 object, if the vesica (as we term it in the Lepidoptera) were 

 well ejaculated, but I would draw attention to the lateral 

 sclerites, which in this genus do not appear to be sensory, 

 but are more likely from their length and structure to be 

 excitatory organs for use on the exterior of the female abdo- 

 men ; the long, smooth rods do not seem at all likely to be 

 sensory so far as the male is concerned. 



Silpha quadripunctala, L., 



bears out entirely the suggestions of the previous species, 

 the lateral sclerites are shorter but are more robust — other 

 species of the same genus have the genitalia on entirely similar 

 lines of structure. 



Ichthyurus pachygaster 



represents a genus with a pair of forcep-like sclerites, that 

 almost remind one of the Dermaptera ; the dorsal section is 

 deeply bifurcate, curved on the upper margin and more or 

 less cuneate, whilst the ventral section is quite small, also 

 cuneate and bifurcate. The whole arrangement of these 



