55 



closely resembling P. burrow i ; Anuraphis xanthii on various species 

 of Xanthium ; Aphis ampelophila on vines and closely resembling 

 A.sambuci, L. ; A. affinis var. gardeniae v&T.n., on Gardenia radicans ; 

 A. camellicola on cultivated camellias ; Rhopalosiphon sisymbrii, Del 

 Guercio, on Sisymbrium arnottianum. 



Del Guercio (G.)- Intorno ad un nuovo nemico del carubo in Italia : 

 Eumarschalia gennadii (March.) nob. [Concerning a new enemy 

 of the carob bean: Eumarschalia gennadii (March.)] — Redia, 

 Firenze, ix, (1913) pt. 2, 31st March 1914, pp. 227-232, 3 figs. 

 [Received 12th November 1914.] 



Carob beans, an important crop in Southern Italy, have been 

 attacked since 1904 by a Dipteron believed to be Schizomyia gennadii, 

 Marchal, for which the author erects a new sub-genus, Eumarschalia. 

 The parenchyma of the young beans is pierced, causing them to 

 become badly deformed, and they either drop ofE or are so reduced 

 in size as to be useless. Vigorous plants which are growing rapidly 

 in the summer months prior to gatheririg are not attacked, which is 

 of importance from the point of view of control. In the injured 

 beans are minute larvae of a deep orange-yellow colour. Oviposition 

 takes place in the summer and autumn, the ovipositor being thrust 

 deep down into the bean, and in some districts from 50 to 60 per 

 cent, of the crop is affected. The only control possible at present 

 is the collection of the injured beans toward the end of summer, 

 just before harvesting. These should be placed in an oven or in 

 boiling water in order to kill the pests and may then be made use of. 



Del Guercio (G.). II parassita del Rinchite dell'Olivo. [The parasite 

 of the Olive Rhynchites.] — Redia, Firenze, ix, (1913) pt. 2, 

 31st March 1914, pp, 233-234. [Received 12th November 1914.] 



The irregularity in the occurrence of the species of Rhynchites which 

 does serious injury to the olive, is due to a parasite, first dis- 

 covered in 1911, but not previously recorded. Laboratory and field 

 observations show that under c^'rcumstances not yet understood, the 

 weevil larvae may sometimes be completely exterminated by a minute 

 nematode, which attacks them when they burrow into the soil after 

 leaving the olive. The dead larvae become covered with a felt-like 

 mass, consisting of innumerable minute worms. In those years in 

 which the parasite does not occur, great damage is done by this 

 weevil. 



Del Guercio (G.). Intorno a due nuovi VacunidI del Castagno. [Con- 

 cerning two new Vacunids of the Chestnut.]— i2e(?ia, Firenze, ix, 

 (1913) pt. 2, 3l8t March 1914, pp. 285-291, 1 pi. [Received 

 12th November 1914.] 



Two new Aphids found on Castanea saliva, Goert., are described, 

 viz. : — Vacuna castaneae and V. carlucciana. 



