30 [February, 



And this brings to a close these incomplete notes on some of the 

 more salient features of the Coleopterous fauna of a particularly inte- 

 resting district. Without a doubt many other species occur here which 

 the present writer has failed to detect. Other observers may have been 

 more fortunate ; for of no fact does a long experience of collecting 

 beetles, or, indeed, any group of insects, convince one more than that 

 our most assiduous efforts reveal to us only a small minority of what 

 really exist, and that there are many species of whose presence we may 

 remain entirely ignorant unless we are in the right place exactly at the 

 right time. 



" TLe Bungalow," Crowthorne. 

 Nwemher 1917. 



CROLEVA ANGUSTATA F. AXD ITS ALLIES. 

 BY H. BEITTEX, T.E.S. 



A careful study of the insects belonging to the anqiistafa-group 

 of Clioleva (excluding, of course, the very distinct C. spadicea and 

 C. agil-is) has convinced me that we possess five good species in Britain, 

 i. e. two more than given in Fowler's " Col. Brit. Islands." One of 

 these cannot be identified from the continental literature, and it is 

 necessary to give it a new name. They should be readily separated 

 by the following table based on the sb'uctm'al characters of the two 

 sexes in each case : — 



1, Posterior trochanters similar in the two sexes, simple ; male with a small 

 tooth on first third of posteiior femora ; female with apex of elytra 

 toothed. 



a. Form naiTower and shorter: thorax broadest near front, slightly 

 broader than long, with posterior angles rounded : sculpture of 

 upper surface finer and closer ; posterior trochanters short and 

 blunt. Male with second, third, and fourth ventral segments of 

 abdomen impressed in centre, sixth simple at apex ; median lobe 

 of aedeagus (fig. 1) with a fine sharp tooth at apex. Female with 

 apex of elytra sloping gradually to tooth sturmi Bris. 



h. Form broader and longer ; thorax broadest near middle, as long as 

 broad, posterior angles more evident ; sculpture of upper surface 

 coarser and not su close ; posterior trochanters short and pointed. 

 Male with third and fourth ventral segments of abdomen im- 

 ])ressed in centre, sixth raised into a distinct ridge in middle, 

 and with a triangular excision of apex ; median lobe of aedeagus 

 (tig. T)) divided into two curved teeth, the points turned inwards 

 like the forceps of an earwig. Female with apex of elytra 

 bluntly rounded to tooth amjustata F. 



