32 Mr. C. J. Gahan on Longicorn Culeoptera 



The types of all the species quoted above (with the excep- 

 tion of P. inclemens } Thorns., which I have had an oppor- 

 tunity of examining) are contained in the British Museum 

 collection, and, after careful comparison, I have come to tin; 

 conclusion that they represent but a single species. The 

 types of simplex (White) and sericeus (Dej.) differ from the 

 others in having the elytral derm reddish brown rather than 

 dark brown. The distribution of the species, so far as it at 

 present is known, is somewhat strange, and has caused me to 

 hesitate before arriving at the conclusion stated above. The 

 specimens named simplex and heterocerus are from West 

 Africa, the types of holosericeus (Oliv.), vernicosus, and 

 inclemens are from India, and sericeus is from Java. There 

 are also in the Museum collection dark-coloured specimens 

 from Siam. 



To avoid the confusion which might arise by adopting 

 Olivier's name I have taken as the name of the species the 

 one which comes next in order of priority. 



Pachydissus (Diorthus) vagus, sp. n. 



P. simplici affinis et similis, sed differt pube grisea densiore, articulo 



antennarura tertio quani quarto paullo longiore. 

 Long. 25, lat. 7^ mm. 



Hob. "Senegal?" 



Clothed with a dense ashy-grey pubescence, somewhat 

 thinner on each side of the elytra before the middle. An- 

 tenna} (in the single male before me) about half as long again 

 as the body, with the third joint not much longer than the 

 fourth, with the scape cicatrized as in P. simplex. Femora 

 feebly carinate on each side. The sculpturing of the pro- 

 thorax is apparently almost exactly the same as in P. simplex, 

 but, owing to the denser covering of pubescence, is not so 

 easily seen. 



This species has a strong resemblance and an evident 

 affinity to P. simplex (White), and its habitat might have 

 thrown some light upon the distribution of the latter. Un- 

 fortunately, however, of the two specimens one (the male 

 type) is ticketed " Senegal ?," the other (a female, in Mr. 

 Fry's collection) is ticketed tl Nov. Holland." The Latter 

 locality can scarcely be correct. 



Xuanodera latteorms } sp. n. 



Nigro-fusca ; prothoracc supra irregulariter corrugato, dorso utrinque 

 fulveseentc bivittato; chtris maculis lineisque fulvescentibus, 



