112 BRITISH CICADA. 



Typhlocyba AVELLANiE, Edtv, Plate LXXII., fig. 3. 

 Ent. Mo. Mag. xxv. 158, figs, d, e,f. 



Ground colour yellow, with the head, pronotum, and 

 scutellum rather darker fuscous. The scutellum some- 

 times has yellow streaks, and two very pale vertical 

 lines. The elytron, also has an indication of a white 

 costal spot. Frons and all underneath parts pale 

 yellow. Legs whitish or ochreous. 



A pale yellow species of Tijphlocijha is very common 

 on the hazel bushes {Conjhis avellana) at Weycomhe, 

 Haslemere. I have not been able to dissect out the 

 genitalia, but there appears to me no reasonable 

 doubt of the identity of these insects with those first 

 taken by Mr. Douglas at Lewisham, and afterwards 

 described as new under the name of T. avellance by 

 Mr. Edwards. 



On July 26th, also, I took five examples of insects on 

 the oak which I could identify only with T. avellance. 

 One of these was a male. When the female specimens 

 were treated with alcoholic potash, and washed with 

 water, the details of the genitalia could be readily made 

 out. Of these four females, one had a purse-like parasite 

 attached below the thorax, doubtless a Gonatopus of 

 some kind. The body of the Cicad was largely charged 

 with oil-globules, but I could find no ova. These 

 insects possibly had roved from the hazel ; but there 

 is no reason to suppose that this species only affects 

 that tree. 



Except from the varied food-plants, the insect out- 

 wardly might well be regarded as a variation from 

 T. Tosce. 



Length, 0-14 inch, 3'50 millimetres. 



