6S [August. 



upon the insuSiciencj of Curtis's description (leider zu kurz bescliriebeuen). After 

 all, therefore, there may be but one species, and, as I said before, the matter requires 

 investigation. If the month of July should be too late to obtain examples matured 

 in May, an examination of the mistletoe in August may possibly result in finding 

 that there is a summer generation from which the spring brood comes. 



Fsylla sylvicola. — Under this name, M. Lethierry, in 1874 (Hem. Nord, p. 90), 

 described a good and distinct species found in France and also iu Britain. Herr v. 

 Frauenfcld having long since described a Fsylla sylvicola in the Verhandl. z.-b. G-es. 

 Wien, xi, 170 (1861), it appears at first sight that M. Lethierry's specific name must be 

 changed ; but it may be retained, because v. Frauenfeld's species belongs to the genus 

 Trioza [cf. F. Low, Verhandl. z.-b. Gres. xii, 107). It was found abundant on Senecio 

 nemorensis, Lin., growing in the high woods of the Alpleck mountains, and is de- 

 scribed as being one of the smallest of the Psyllidm, only 1 mm. long, entirely pale 

 yellow, except the prominent black eyes, the antennae brown beyond the 5th joint, 

 and the nerves of the transparent wings yellowish-brown. 



Among the species which I noted (p. 41 ante) as desirable to re-find in this 

 country were Aphalara exilis, Weber and Mohr, and Aphalara ftavipennis, Forst. 

 I find that the former has been taken iu some numbers by Dr. Power, and that the 

 latter is accounted to be a synonym of A. picta, Zett., but it has been rare with us 

 hitherto, and is still worth looking for. It is said to occur commonly in meadows on 

 the continent, but the food plant is unknown. — J. W. Douglas, Lee : Jtily 10th, 1876. 



Entomological Society of London : 5th July, 1876. — Professor Westwood, 

 President, in the Chair. 



Mr. Douglas exhibited the following Psyllidce taken in the month of June, 

 near Lee : — Psylla sp. ?, possibly hetulce, Lin., Flor, on birch trees. P. spar- 

 tiophila, Forst., on broom bushes. Aphalara venosa, Forst., new to the British 

 fauna, now first identified as living on Achillea millefolium, it having only been 

 taken casually by Foerster and Flor. Rhinocola aceris, Lin., on maples. P. ericce, 

 Curt., on heather. 



The President said, with reference to this exhibition, he was glad to see that 

 attention was directed to the interesting but neglected Psyllidce. 



The President exhibited a number of insects of several orders, delicately dis- 

 played and mounted on slides for microscopic purposes by Mr. Enock. Also some 

 flower-stems of horse-chestnut, each with a longitudinal incision and eaten hollow by 

 some insect, somewhat after the manner in which terminal shoots of fir trees are 

 eaten out by the larvae of Retinia turionella ; and he was desirous of finding out 

 what insect was the depredator, no means of identifying it remaining in the stems. 

 He also exhibited specimens of Coccus camellia, a scale insect, the females of which 

 he had first described long since in the ' Gardeners' Chronicle,' and which were found 

 on a young Camellia in his greenhouse. The females are of a flattened oval form, 

 and emit a quantity of white waxy matter from the extremity of the body, which 

 secretion is gradually pushed backward till it extends nearly half-an-ineh, and has 

 quite the appearance of the excrement of a small bird ; the eggs are deposited 

 within the secretion. The males had not bgen observed. He also exhibited a 



