1S82. 253 



and apex black ; the apical half of the tarsi black. Abdomen elongato-clavate, sub- 

 compressed, black above, beneath yellow, with the edges of the segments broadly 

 edged with dark testaceous, merging into black towards the apex ; basal segment 

 above smooth and shining for about two-thirds its length, the apical portion thickly 

 but slightly punctured, the sides parallel for about two-thirds, when it grows sud- 

 denly wider ; second segment twice as long as wide, and about two-thirds longer 

 than the third segment. All clothed with a short whitish pile. Ovipositor testa- 

 ceous, curved, about one millimetre in length. 



I have four specimens of this species : I captured two by sweeping 

 vetches in a field near Exeter, in June, 1881, the others I bred from 

 a hedge at Lydford, on the border of Dartmoor. The description 

 applies to both sexes, as do also the measurements. 



This insect in general appearance and colouring might, at first 

 sight, be taken for a a small specimen of G-ravenhorst's Camjpojplex 

 viennensis ; according to this author's arrangement, it would come 

 in his second section, but naturally it would seem to be nearly allied to 

 C. viennensis, on which account I have named it affinis. 



Exeter : 8th March, 1882. 



THE BRITISH PSYLLINA, WITH CORRECTIONS IN THE SYNONYMY. 



BY JOHN SCOTT. 



Some attention being now given to this interesting group by 

 several students, perhaps it will not be out of place for me to lay 

 before them a complete list of the genera and species found in the 

 British Islands down to the present time, together with such corrections 

 in the synonymy as have been made since the publication of my 

 Monograph in the Trans. Ent. Soc. for 1876. From the time of the 

 appearance of Dr. Forster's Monograph, in 1848, until lately, no 

 attempt was made to alter or interfere with his arrangement generi- 

 cally or otherwise : probably, this may have arisen from a paucity of 

 observers. In 1877, however, Prof. C. Gr. Thomson, in his " Opuscula 

 Entomologica," fasciculus, 8, gave a Synopsis of the Scandinavian 

 species, under the title of "Ofversigt af Skandinaviens Chermes-arter," 

 wherein he desires to restore the name Chermes, originally given to 

 some of them by Linne ; no one, however, of late days has adopted it 

 except Thomson, and whether he will have many followers remains to 

 be seen. His further innovations as regards sections of the genera 

 employed by Forster point in the right direction, and w r ith respect 

 to Trioza Walkeri, which he makes the type of a sub-genus, Triclw- 

 psylla, I would go further and give it generic rank ; the structural dif- 



