51 



were first seen about 10th August and disappeared about the 24th. 

 When confined together in numbers they seemed to be cannibahstic. 

 They pupated in confinement in late August and early September, 

 and the moths emerged from 18th September to 2nd October. 



It is thought probable that there may be several more species that 

 infest bogs that have been drained of their winter flood at midsummer. 

 Tlie moths of the fall armj^-worm apparently prefer to oviposit on bogs 

 recently drained, and probably other species have similar habits. 

 Moths collected on one bog a few days after the flood was let off on 

 10th August included Nomopkila noctiiella, Schiff., Caenurgia {Drasteria) 

 erechtea, Cram., and Syngrapha {Autographa) falcifera var. simplex, Gn. 

 None of these was found on any bog that had the winter flood let off 

 early, and no infestation of caterpillars occurred later where the moths 

 had appeared. 



Frost (C. A.) & Weiss (H. B). A Bibliography of the Literature on 



the described Transformations and Food Plants of North American 



Species of Agrilus (Col.). — Canad. Entoin., London, OnL, lii, no. 10, 



October 1920, pp. 220-223. 



This is the second instalment of a paper previously noticed [R.A.E., 



A, viii, 516]. The species of economic importance dealt with include 



A. politus, Say (oak twig-girdler), A. burkei, Fish., infesting alders, 



A. viridis, L., vslt. fagi, Ratz., infesting roses, A. sinuatus, 01. (sinuate 



pear borer), A. fallax. Say, infesting honey locust, A. obsoletogiUtatus, 



Gory, infesting beech and oak, and A. egenus, Gory, infesting hickory 



and Rohinia. 



Weiss (H. B.) & West (E.). Notes on Galemcella nymphaeae, L., 

 the Pond-Lily Leaf -beetle. (Col.). — Canad. Entom., London, 

 Out., lii, no. 10, October 1920, pp. 237-239. 



Galerucella nymphaeae, L. (water-lily leaf-beetle) occurs throughout 

 New Jersey on the yellow water-lily {Nymphaea advena), damaging 

 the leaves and flowers. Hibernation probably occurs in the adult stage. 

 The eggs are deposited on the leaf in clusters of up to 20, and hatch 

 in about a week. The young larvae feed in colonies on the upper 

 layers of the leaf tissue, causing irregular bare patches ; as they become 

 larger, they separate and feed independently on either side of the leaf. 

 In New Jersey many individuals become full-grown about the third 

 week in June, and pupation occurs on the leaf surface, lasting about a 

 week. There are at least two generations ; from the middle to the 

 end of June all stages except eggs may be found. 



Other food-plants of G. nymphaeae that have been recorded include 

 several aquatic species and also basket willows and beans. 



This beetle is evidently an imported pest, and is abundant in Northern 

 Europe and Siberia, as well as being widely distributed in the United 

 States. A description of the early stages is given. 



According to Chittenden arsenicals are effective in checking the 

 beetle on willow, and for aquatic plants he suggests flooding, with a 

 few drops of oil on the water to destroy the floating insects. It was 

 noticed that the insect was absent in areas where the water-liUes were 

 entirely covered by the tide each day. 



BuscK (A.). A New Gracilaria injurious to Avocado (Lepid.). — 



Canad. Entom., London, Ont., lii, no. 10, October 1920, p. 239, 

 3 figs. 

 Gracilaria perseae, sp. n., is described from avocado in Florida, 

 where it was bred from the leaves. This moth is said to be seriously 



