175 



B. dioica. Hibernation occurs in the pupal stage, which at Portici 

 terminates between the end of April and the end of May. The 

 proportion of females to males is as 13 to 17. 



The eggs are deposited in immature berries, only the epidermis 

 and a portion of the pulp surrounding the seeds being left by the 

 larva. After reaching full development the larva pierces the skin 

 and drops to the ground, into which it burrows for pupation. At 

 Portici the first mature larvae were observed on 2nd June and the 

 last on 8th August. The first pupa was seen on 9th June. Develop- 

 ment from egg to pupa takes about 40 days. 



Opius testaceus. Wesm., a Braconid parasite of the larva, is re- 

 described from Portici ; hitherto it had only been recorded from 

 Belgium and England. The author thinks that confirmation is 

 required for the opinion expressed by Marshall that Laccoparys 

 villaenovae, Vollnh., is a synonym of 0. testaceus. 



SiLVESTRi (F.). Contribuzione alia Conoscenza dei Parassiti delle Ova 

 del Grilletto canterino [Oecanthus pellucens, Scop., Orthoptera, 

 Achetidae). [A Contribution to the Knowledge of the Parasites 

 of the Eggs of 0. pellucens.]— Boll. Lab. Zool. Gen. Agrar. R. 

 Scuola Sup. Agric, Portici, xiv, 1920, pp. 219-250 20 figs 

 [Received 6th February 1921.] 



Salvi's description of Oecanthus pellucens. Scop., is quoted, and 

 the author states that this tree-cricket oviposits in the stems of many 

 herbaceous plants with a soft pith, including Centaur ea dissecta and 

 Daucus carota. Salvi and Perris have also found the eggs in the 

 twigs of Rubus. In central and southern Italy 0. pellucens oviposits 

 from the second half of August to October, and the larvae hatch in 

 mid-June in the following year. 



From stems containing the eggs the following Chalcids were bred :— 

 Archirileya inopinata, gen. et sp. n., Eurytonia oophaga, sp. n., and 

 Tctrastichus ovivorax, sp. n. 



A. inopinata has from one to two generations a year. The first 

 develops in the eggs of Cicada plebeja and Tettigia orni, though those 

 of 0. pellucens may also be attacked, and the second in those of 

 0. pellucens. E. oophaga appears to be the species recorded by Perris 

 from France as E. vagabunda, Gir. Its distribution probably coincides 

 with that of 0. pellucens. It has two generations, with perhaps a 

 partial third. T. ovivorax has at least two generations, both of which 

 parasitise the eggs of 0. pellucens. 



Parasitism by three other Chalcids, Tetrastichus percaudatus. 

 sp. n., T. dispar, sp. n., and Eurytoma phaenacidis, Mayr, was not 

 established. 



Grandi (G.). Descrizione di una nuova Blastophaga a Maschi com- 

 pletamente astomi e di una nuova Julianella di Costarica. [Des- 

 cription of a new Blastophaga with mouthless I\Iales and of a 

 new Julianella. both from Costa Rica.)— 5o//. Lab. Zool. Gen. 

 Agrar. R. Scuola Sup. Agric. Portici. xiv, 1920, pp. 251-264, 

 7 figs. [Received 6th February 1921.] 



The two new Agaoninae from Costa Rica here described are Blasto- 

 phaga [Julianella) torresi from Ficus velutina, and B. astoma from 

 Ficus crassiuscula. 



