ANDEICTJS MALPIGHTI. 99 



in June ; in Mugdoch Wood in July and August. Fitch 

 records it from Rayleigh ; and Mr. Bignell takes it at 

 Plymouth. 



Continental distribution : Germany. 



13. Andbious Malpighii. 

 PI. VII, fig. 2, gall. 



Aphilothrix Malpighii, Adler, Zeits. wiss. Zool., xxxv, 183, 



pi. xi, fig. 12. 

 Andricus nudus, Adler, 1. c, 184, pi. xi, fig. 12 a. 

 — Malpighii, Mayr, Europ. Cyn., 21. 



The agamic form not distinguishable from A. quadrilineatus. 



Gall. — Found in the buds in October. Spindle- 

 shaped, shortly pedunculate, the apex pointed; green, 

 smooth, often with reddish stripes. 



It differs from the gall of callidoma in haying the 

 peduncle much shorter, and may even want it entirely ; 

 the former is thicker and shorter, and it appears in 

 October, while callidoma is found so early as Jane. 

 It is, however, to be remarked that when the galls of 

 callidoma are attacked by Synergi the peduncle is 

 shortened, so that in this case the distinction between 

 the two is rather vague. 



Sexual Form. — Black, the abdomen paler, beneath testaceous, the legs 

 pale yellow ; the four anterior coxae at the base, the hinder for the 

 greater part, brownish; sometimes the femora are infuscated ; the joints 

 of the tarsi blackish. Autennse with the basal four or five joints yel- 

 lowish ; the others darker or fuscous. 



The $ has the femora and tibia? blackish ; only the two basal antennal 

 joints are yellow. 



Length 1*5 mm. 



Gall. — Found in May on the <$ catkins, placed 

 usually between the stamens. Length barely 1^ mm. 

 Bare, green when young, yellowish at maturity. In 

 shape an elongated oval, the apex narrowed perceptibly. 

 Sometimes with a distinct nipple-like point at the 

 apex. 



