431 



Poda, are exclusively mycophagous insects. The Dipteron, Aphiochaeta 

 {Phom) fasciata, Fall., and the Chalcid, Homalotylus jlaminius, Dalm., 

 considerably reduce the numbers of the former. 



Martelli (G.). La mosca delle arance {Ceratitis capitala, Wied.) vive 

 nei nostri liraoni? [Will Ceratitis capitata, Wied., hve in our 

 lemons?] — pp. 161-164. 



The eggs of Ceratitis capitata, Wied., were artificially introduced into 

 lemons, some of which were still green and others nearly ripe, care 

 being taken to allow the oil exuding from the punctures to dry first. 

 On hatching, the larvae emerged from the punctures and died after 

 wandering about for some hours. In the case of mandarins and ripe 

 oranges, the larvae burrowed into the mesocarp, but di.-d before 

 reaching the pulp. Adult Ceratitis were enclosed in gauze bags with 

 lemons growing on the tree ; none of the fruit, some of which was 

 still green, showed puncture marks or any abnormality which could 

 be attributed to the fly. 



Martelli (G.). Alcuni esperimenti con VEccoptogaster (Scolytus) 

 ami/gdali, Gu6r., VE. rugidosus, Ratz., e l'^". pruni, Ratz., ritenuti 

 rispettivamente parassiti determinanti la morte del mandorlo, pesco 

 e prugno. [Some experiments with Eccoptogaster (Scolytus) amyg- 

 dali, Guer., E. rugulosus, Ratz., and E. pruni, Ratz., believed to 

 be parasites respectively causing the death of the almond, peach 

 and plum.] — ^pp. 165-170. 



The deaths of almond, peach and plum trees have been attributed 

 to Scolytus amygdali, Guer., S. rugulosus, Ratz., and S. pruni, Ratz., 

 respectively, but the results of a series of experiments, detailed in this 

 paper, show that these insects only accelerate the death of trees already 

 injured by gummosis and root-rot. These beetles cause the exudation 

 of gum in the same way as any mechanical agency, but cannot be held 

 responsible for the spread of gummosis. Healthy plants, on the other 

 hand, resist beetle attack. Both S. amygdali and S. pruni have dehcate 

 senses, enabling them to find the diseased trees which alone are t^uitable 

 for breeding places. 



Weise (J.). Chrysomeliden und Coccinelliden aus Erythraea. [Chryso- 

 melids and Coccinellids from Eritrea.] — -pp. 227-233. 



The following new Chrysomelids and Coccinellids sent from Eritrea 

 by Prof. Silvestri are described : — Argopistes silvestrii, Exochomiis 

 cherenensis, Hyperaspis mercki, Muls., var. compacta nov., and Nephus 

 vetustus. 



Silvestri (F.). Contributo alia conoscenza degli insetti dell' olivo 



deir Eritrea e dell' Africa meridionale. [A contribution to the 



knowledge of the insects of the olive in Eritrea and South 

 Africa.]— pp. 240-334, 78 figs. 



The author was in Eritrea in August and September 1914 for the 

 purpose of collecting parasites of Dacus oleae [see this Review, Ser. A, 

 iii, p. 173], and the present paper is a systematic record of a number 



