Au^ist, 1907.] 169 



ffinous ; this latter form has caused considerable difficulty with 

 collectors, but it may readily be known if compared with the normal 

 form, with which it entirely agrees in shape and puncturation. It is 

 generally known as the ab. pnfrnelis of Sturm. 



C. vnlidiis and G. suhfiiimitiis.— There has been great confusion 

 both in England and on the Continent as to these species. It is 

 difficult to say how it arose, as the main points of Kraatz's descrip- 

 tions are clear and agree with the types which I have seen since the 

 table was in type. Some of the first-determined British specimens 

 of C. validnf!, which has, however, been taken on very few occasions 

 here, were named by Eye as G.fumatus (see Fowler, Col. of Brit. Is., 

 vol. iii, p. 323), and several of the old collections will probably be 

 found to have the insect under this name. Another insect, which is 

 undoubtedly C. imlidus, was named by Rye as C. sithfumaUis, and this 

 is the specimen mentioned in Fowler as in Mr. Champion's collection. 

 0. voUdus is a large, broad, rather dark insect, something like 

 C. popuJi when viewed from a distance, with fine close puncturation, 

 the callosities of the front of the thorax very little developed, only 

 a small tooth in middle of sides, and with close rather long golden 

 pubescence, the elytra somewhat parallel-sided, and the legs long, 

 with the tibiae widened towards the apex, I have received it from 

 the Continent under the name O. siihfumafus, so that I do not feel at 

 all sure that Ganglbaiier has not inverted the two species. Fowler's 

 description is, however, perfectly correct. Any one who has any 

 doubt as to the insect has only to see the specimen in the Power 

 Collection at the British Museum. I do not think that after 

 seeing an example of the right insect confusion is possible. G. sub- 

 fiimatus appears also to be British ; it was in the Power Collection 

 mixed with var. patrueUs, but has now been separated. Mr. 

 Champion has also specimens which must, I think, belong here. 

 It usually has long elytra, but a specimen from the Continent sent 

 me as G. validus, and another from Huntingfield, which appear 

 undoubtedly to belong to the insect, do not show the character in 

 a marked degree. The distinction from G. scanicus given in ray table 

 will do, whether intended by Ganglbauer to apply to the insect or to 

 G. validus, if the character as to the central tooth of the thorax is 

 omitted. The table would be perhaps more satisfactory if, besides 

 this omission, there were substituted on page 320 : — 



a* — A large, broad, and usually dark insect, with the antennae normal (not 

 particularly stout), and the thickened part of tlie anterior angles 

 of the thorax little developed validus, Kraatz (? Ganglb.). 



h* — Insect not as a*. 



