472 



C. dictvospermi , C. anrantii, Hemichionaspis minor, Phenacaspis inday, 

 larvae" of Hvposmocoma and Prenolepis sp. and undetermined Coccids 

 on coconnts ; Diaspis bromeliae and Pseudococcus hromeliae on 

 pineapple ; D. hromeliae, P. hromeliae and Coccus elongatus on betel 

 leaves ; Hemichionaspis aspidistrae on oranges ; and Saissetia nigra 

 on Hihiscus cuttings. From Porto Rico, Lepidosaphes heckii on oranges. 

 From Haiti, undetermined Lepidoptera and weevils in cacao beans. 

 From Tahiti, Chrysomphalus anrantii on oranges and lemons and 

 Lepidosaphes heckii on limes. From Australia, Chrysomphalus anrantii 

 and Pseudococcus sp. on coconut. From China, Parlatoria sp. on 

 pomelo and P. pergandei on orange. From Japan, undetermined 

 Lepidopterous larvae in chestnuts, beans and pears ; Lepidosaphes sp. 

 on pears ; and Parlatoria pergandei, Hemichionaspis aspidistrae and 

 Pseudaonidia trilohitiformis on orange. From Siam, Chrysomphalus 

 aurantii and Hemichionaspis aspidistrae on pomelos. From Spain, 

 undetermined Lepidopterous larvae in almonds. 



Calvert (P. P.). Methods for expressing the Associations o£ Different 



Species. — Ecology [Brooklyn, .Y. Y .], iii, no. 2, April 1922, 



pp. 163-165. [Received 26th July 1922.] 



Hacker's method for studying the typical distribution of species 



[R.A.E., B, ix, 73] is discussed and is compared with that of Forbes, 



devised in 1907. It is suggested that it will be interesting to test both 



methods by data derived from other groups of organisms. 



BoNDAR (G.). Os Insectos damninhos. xxi. Uma Lepidobroca da 



Batata doce, Megastes pucialis, Saell. [Injurious Insects, xxi. 



M. pucialis, a Caterpillar infesting the Sweet Potato.] — Chacaras 



e Quintaes, S. Paulo, xxv, no. 6, 15th June 1922, pp. 473-474, 



2 figs. 



A Pyralid, Megastes pucialis, Saell., is an important sweet potato 



pest in the State of Bahia, Brazil. In that region it breeds throughout 



the year, but the main injury occurs in winter (May- August) . The 



larvae mine the stems, which swell and may harbour as many as live 



or six individuals. From this point they bore into the branches and 



root, which becomes hypertrophied. If the attack extends to the tubers 



they are rendered useless. The presence of the larva is revealed by 



the excreta near the collar of the plant or by the death of the stems. 



Even if they do not die, infested stems can be recognised in hot sunshine 



because they wither more quickly than the others. Pupation takes place 



in a silken cocoon in the stem. The pest is most troublesome at the 



time sweet potatoes are planted in June to August, fifty per cent, of 



the plants being sometimes destroyed. 



The moth breeds on various Convolvulaceae and migrates from them 

 to sweet potato. This crop should be planted during the summer rains 

 (January to April) so as to have reached full growth when the 

 attack begins. 



\-A 



Weise (J.). Ueber einige amerikanische und australische, nach 

 Siidfrankreich eingefiihrte Coccinelliden. [Some American and 

 Australian Coccinellids introduced into the South of France.] — 

 Wiener Ent. Zeitg., Vienna, xxxix, no. 1-4, 30th March 1922, 

 p. 104. [Received 20th July 1922.] 

 The Coccinellids in question are Hippodamia convergens, imported 



from North America to check Aphids on fruit trees, and two Australian 



