2216 Insects. 



their collections, but also, in many instances, by presenting me with 

 specimens of rare, local or unique insects. To Messrs. Desvignes, 

 Walcott, Thwaites, J. F. Stephens, Samuel Stevens, Doubleday, Dale, 

 Waterhouse, Bowring, the Rev. W, Little, and the Rev. J. F. Daw- 

 son, I return my most sincere thanks for their kind assistance. 



Frederick Smith. 

 5, High Street, Newington, 

 June, 1848. 



Descriptions of two Species of Trichius supposed to be British. — It appears to me 

 that we have in this country two species of the genus Trichius which have hitherto 

 been confounded ; at least I am not aware that any one has decided the question, and 

 it is with the intention of so doing that I address a few words to the readers of the 

 * Zoologist.' The species in question are the Trichius fasciatus of Fabricius and the 

 T. zonatus of Schmidt. This point I think it will be desirable to determine. Both 

 species undoubtedly exist in cabinets. All the specimens taken in Scotland are, I be- 

 lieve, the T. fasciatus ; and all the specimens which I have seen of zonatus are from 

 old collections. I have not been able to ascertain satisfactorily the locality of any of 

 the specimens, or by whom they were captured. I send you short descriptive differences, 

 whereby any one can ascertain which species he possesses ; and should any one be 

 able to give the locality of zonatus, and satisfactory evidence of its capture, the 

 question will be at once decided. I have some idea that the Swansea and other 

 West of England specimens may prove to be zonatus, and the northern specimens 

 the T. fasciatus. 



Sp. 1. Trichius zonatus, Schmidt, Germ. 

 T. Gallicus, Dej. Cat. T. abdominalis, var., Schmidt, Dej. Cat. 



Male. — The lateral margins of the thorax immaculate ; the central segment of the 

 abdomen transversely striated, and having two yellow maculae ; the anterior coxae have 

 a yellow macula in front. 



Female. — The lateral margins of the thorax yellow, sometimes interrupted ; the 

 ventral segments immaculate. 



The elytra in both sexes black, having the suture black, with two transverse yellow 

 fasciae united to a longitudinal one, which reaches to the angle of the shoulder. The 

 base never has a transverse black band. The yellow fasciae are nearly, or quite, of 

 equal width. 



Sp. 2. Trichius fasciatus, Fab. 



Male. — The anterior coxae not maculated, nor are the ventral segments macu- 

 laled. 



Female. — The thorax has a lateral yellow macula. 



In this species the elytra are usually entirely black at the base, sometimes inter- 

 rupted, but the longitudinal fascia does not reach to the angle of the shoulder ; the 

 basal transverse yellow fascia is usually much broader than the second ; the apex of 



