is'.n.] 29 



I have not been able to examine types of either C. fasciifrons or 

 C. opncipennis, and in their absence it is impossible to be certain that 

 the insects here called by those names are identical with the insects 

 from which the descriptions of those species were taken by their 

 respective authors ; but, judging from description, it seems probable 

 that they are so, and I have, therefore, thought it better^ instead o£ 

 creating fresh names, to adopt those of Stal and Lethierry respectively, 

 leaving the question of the identity of our insects with theirs to be 

 absolutely decided hereafter by some one enjoying the requisite facili- 

 ties for the purpose. With regard to C. opncipennis, M. Lethierry is 

 of opinion that our insect is a variety of that species, although he 

 cannot say for certain, as the species was described from a single 

 example which belonged to M. Jakowleff. 



The following is a table of all the species at present known to me 

 as occurring in Britain : — 



1 (4) The two subocellar black spots wanting. 



2 (3) Frons without transverse dark lines ; crown as long or longer than its 



basal width ... 1. metria,'F\ox. 



3 (2) Frons with more or less distinct brown transverse lines ; crown about one- 



third shorter than its basal width 2. oparipennis, \jet\\. 



4 (1) Subocellar black spots present (frequently confluent with each other and 



the adjacent markings). 



5 (10) Frons without black transverse lines. 



6 (7) Frons with a black spot just above the clypeus 3. 7-wo^a^rt, Fall. 



7 (6) Frons without a black spot at the apex. 



8 (9) Subocellar spots below the ocelli ; crown with two large prsebasal spots... 



4. variata, Fall. 



9 (8) Subocellar spots behind the ocelli ; prsebasal spots of the crown wanting 



or punctiform 5. punctifrons, ¥1111. 



10 (5) Frons with more or less confluent black transverse lines, or entirely black. 



11 (12) Subocellar frontal spots each composed of two short parallel curved lines 



6. fasciifrons, Stal. 



12 (11) Subocellar spots entire, or confluent with the adjacent markings. 



13 (16) Markings of crown and frons, as a rule, distinct. 



14 (15) Size larger ; curvature of front and hind margins of crown subcqual, 



nearly all the areas of the elytra filled up with brown... 



7. frontalis, Scott ( ? ). 



15 (14) Size smaller ; crown very distinctly longer in the middle than at the 



sides ; elytra generally subdiaphanous, pale greenish-grey ; convexity 

 of the curve of the arms of the sedeagus beneath .8. 6-}totata, Fall. 



16 (13) Subocellar spots merged with the interocular line, and frequently with the 



basal markings of the crown and the black lines on the frons also, so 

 that the crown and face appear entirely black, or black with a few 

 yellow markings. 



