194 LIST OP BERWICKSHIRE INSECTS. 



cies that abounded in such numbers throughout the district 

 in 1826. This was probably owing to the prevalence of Aphis 

 avenoG during that hot season ; as it was in the corn-fields where 

 the insects were noticed. I have observed only a single indi- 

 vidual since. Cocinella 11-punctata is a coast species, where 

 I have found its larva feeding on Aphis a'cenoe while frequent- 

 ing Poa ^n??2a/e5, likewise on a long wingless Jjo/w's that abounds 

 on the sea-reed ; and as the Aphides that infest the herbage of 

 sandy shores are very numerous, it may serve to check the 

 over-production of several other species. 



The specimen of Tetratoma ancora, sent by Mr. Hislop, dif- 

 fers so much from that figured in Curtis's British Entomology, 

 vol. iiL fig. 123, that I was at first dubious as to their identity. 

 I am convinced, however, that they are alike, the insect, per- 

 haps, as in some of the Mycetophagi, being subject to a variety 

 of colouring. On this account I have judged it as well to de- 

 scribe the insect in detail, along with three others of the re- 

 cent additions to the Berwickshire Fauna, as to which, for 

 the want of such descriptions, there might be a risk of falling 

 into error. 



Tetratoma ancora. Fah. E. ii. 575. Curt Brit. Ent. iii. pi. 

 123. Steph. Hand. iii. 91. Steph. Man. No. 1077. 



Testaceous with a brassy tint, shining, coarsely and irregu- 

 larly punctured throughout ; head dark brown ; eyes black ; 

 antennae ferruginous at the base, fuscous towards the extre- 

 mity with the tip paler : palpi tipped with fuscous ; thorax 

 coloured as the head, margined with testaceous, a fovea on 

 each side upon the posterior margin ; scutellum testaceous ; 

 elytra testaceous, with a common dark brown spot at the base 

 behind the scutellum, a minute dark spot on each side be- 

 neath the shoulders, two lobate dark-brown spots in the mid- 

 dle of each elytron, which are connected with a common dark 

 fuscous lunulate patch at the apex ; beneath entirely brown- 

 black ; femora concolorous, the anterior paler at the base ; 

 tibiae and tarsi ferruginous. 



" Three specimens on fungus, old Fir post, Girrick," Mr. 

 R Hislop. 



