•233 



guajam (guava) and Siachytarphela indica. Helo2)eltis injury and 

 Helopeltis eggs were noticed on Capsicum annuum, Chrysanthemum 

 frutescens, Cymmetra cauliflora, Mangifera sp., Nephelium lappaceum 

 and Tamarindus indicus. In spite of repeated tests Helopeltis was 

 not seen to o\aposit on Ageratum conyzoides, Artocarpus integrifolia, 

 Bidens sp., Burranta plumieri, Ficiis sp., Tephrosia Candida and 

 T. vogelii, though in the case of the two last-named a planter has 

 reported the presence of larvae on them [see also this Review, Ser. A, 

 V, p. 415]. Tests seem to show a marked preference of Helopeltis 

 for cacao over E. foetidum, M. malahathricum and Tephrosia, so that 

 these plants cannot be used as traps. 



A serious infestation of the seeds of various species of cowpeas by 

 the small Bruchid, Bruchus {Pachymerus) chinensis, L., led to obser- 

 vations by Mr. Van der Goot on its habits, as there seemed to be 

 special ground for fearing its capacity for injuring the seed of Tephrosia 

 Candida and other important green manure crops. The eggs are laid 

 in the stored seed of various Leguminosae, and the larvae hatch out 

 in about 4 days and bore into the seed directly beneath the egg. Both 

 larvae and pupae are completely hidden mthin the seed. The adult 

 gnaws a round hole in the skin of the seed. It mates a few hours 

 after emergence and begins to oviposit within 24 hours. It does not 

 live more than a fortnight. The entire development of B: chinensis 

 is short, occupying from 28 to 32 days. From 50 to 70 eggs are laid 

 l)y a female and of these at least 60 per cent, develop into adults. A 

 small unidentified Chalcidid parasitises the larvae ; it appears to 

 ■develop in 21-23 days. B. chinensis does not attack all Leguminosae 

 to the same degree. Arachis hypogaea (ground nut) and Cajanus 

 indicus (pigeon pea) appear to suffer very severely. The beetle also 

 seems to develop perfectly in Vigna cafjang var. Though eggs were 

 laid in captivity in the seeds of Glycine soja no larvae developed. On 

 the seeds of Tephrosia Candida and Leucaena glauca only a few eggs 

 were laid and they did not develop. According to Chittenden, B. chi- 

 nensis o\aposits in the open in the flowers of various Leguminosae, 

 but an investigation of this point with T. Candida proved negative. 

 The larvae of another Bruchid, as yet undetermined, were sometimes 

 found in the pods of T. Candida. 



Matheson (R.). The Poplar and Willow Borer. — Cornell Univ. Agric. 

 Expt. Sta., Ithaca, N.Y., Bull. no. 388, April 1917, pp. 457-483, 

 1 plate, 17 figs. [Received 27th March 1918.] 



The subject matter of this bulletin has already been noticed from 

 another source [see this Review, Ser. A, iv, p. 69]. 



Knight (H. H.). A Revision of the Genus Lygus as it occurs in 

 America north of Mexico, with Biological Data on the Species from 

 New York. — Cornell TJyiiv. Agric. Expt. Sta., Ithaca, N.Y., Bull. 

 no. 391, Mav 1917, pp. 555-645, 1 plate, 50 figs. [Received 27th 

 March 1918.] 



This revision of the genus Lygus has been undertaken owing to 

 the need among economic entomologists of a systematic work to aid 

 in the accurate determination of the species. 



