• g [Januarj-, 



compare it with examples of A. ater Villers {Pterosticluis striola F. of 

 British authors) taken on the island last summer, when it was at once 

 seen to be distinct. 



A. ijarallelus is smaller (my specimen, $ , is 16 mm. in length), 

 narrower, and less depressed than A. ater, and has more the appearance 

 of P. nii/er or P. vulgaris. It is, however, a true Aba.r, differing from 

 Pterosticluis in the absence of pores on the third interstice of the elytra, 

 and in having the seventh interstice raised towards the shoulder. 



From A. ater it differs principally as follows : — 



A, ■parallelus. A. ater. 



1. Claw joint of tarsi without bristles Claw joint of tarsi with bristlos on 



on under side. under side. 



2. Raised 7tb interstice of elytra convex 7th interstice cariniform towards base. 



towards base. 



3. Head with a single marginal sulcus Head broadly sidcate at sides between 



at side§ between eyes. eyes. 



A. parallelus appears to be not uncommon throughout Central and 

 Western Europe, occurring frerpiently with A. ater. British Coleopterists 

 should keep a look-out for the insect on the mainland. 



The specimen has now been placed in the collection of I>ritisli 

 Coleoptera in the Natural History Museum. 



. December nth, 1919. 



MEDON OBSCURELLUS Erichs., AN ADDITION TO THE BRITISH 

 LIST OP COLEOPTERA. 



BY E. A. NEWBERT. 



J have recently sent to Colonel Sainte Claire Deville two dissimilar 

 nsects which have stood for years in my collection as Medoii obsoletiis. 

 With his usial kindness he has examined them for me, and returns them 

 as M. ohsolc'/us Nordm. (verisim.) and 21. ohscurellus Erichs. 



Both these insects belong to the subgenus Pseud omed on Mnls. etliev, 

 distinguished chiefly by the extremely tine and thick punctulation of the 

 uj^per surface and the absence of a smooth impunctate longitudinal line 

 on the thorax. The two species are extremely closely allied, but may be 

 distinguished by the following characters taken from Ganglbauer (Kafer 

 von Mitteleur. ii, p. 524) :— 



Dull pitcli-black. Thorax and elytra sometimes brown, antennae, palpi, 

 and legs brownish-red, the middle joints of the antennae, the palpi, and usually 

 . also the femora and tibiae, brownish. Head narrower than thorax, scarcely 



