34 



Forbes (S. A.)- The Relations of Ecology and Economic Entomology. 



—Jl Ecology, Cambridge, v, no. 2, June 1917, p. 119. 



The author argues that the methods and principles of ecology are 

 fundamental to the study of economic entomology, which deals with 

 the interactions, actual and possible, between insects and man, and 

 that teachers of the latter should base their special courses on 

 ecological pre-requisites. 



Hood (J. D.). An Annotated List of the Thysanoptera of Plummer's 

 Island, Maryland. — Insecutor Inscitiae Mensiruus, Washington, 

 D.C., V, no. 4-6, April- June 1917, pp. 53-65. 



The sixty-nine species of thrips dealt with in this paper include : 

 Limothri'ps cerealium, Hal, feeding exclusively on grasses and cereals ; 

 Franhliniella fusca, Hinds (tobacco thrips), injurious to shade-grown 

 tobacco in the South ; F. tritici, Fitch (wheat thrips), probably the 

 most abundant species in North America ; Anaphothrips ohscurus, 

 Miiller (grass thrips), abundant and destructive in Europe and North 

 America, producing the familiar " silver-top " on many species of 

 grasses ; Scolothrips sex-maadatus, Perg., a species predaceous on 

 mites ; Thrips tabaci, Lind. (onion thrips), a very injurious 

 cosmopolitan species ; Haplothrips statices, Hal., an abundant and 

 destructive species, described by Osborn under the name H. nigra, 

 but identical with the European H. statices ; Zygothrips americanus. 

 Hood, occurring throughout the year under loose bark of every species 

 of tree examined ; Trichothrips anomocerus. Hood, often abundant 

 under sycamore bark, and found under bark of grape ; Rhynchothrips 

 tridentatus, Shull, a conmion species on various oaks ; R. salicarius. 

 Hood, found at the base of young willow shoots, where it deforms the 

 young leaves and retards the gro^vth of the trees ; Leptothrips tnali. 

 Fitch {Cryptothrips aspersus, Hinds), often seen preying on Aphids ; 

 Idolothrips coniferarum, Perg. , abundant on red cedar ; and Neothrips 

 corticis, Hood, occurring abundantly under apple bark. 



Dyar (H. Q.). Miscellaneous New American Lepidoptera. — Insecutor 

 Inscitiae Menstruiis, Washington, D.C., v, no. 4-6, April-June 

 1917. pp. 65-69. 



This paper deals with seven new species, including Vehilius 

 sacchariphila, sp. n., bred from larvae on blades of sugar-canes ; Datana 

 diffidens, sp.n., defoliating oaks; and Eucymatoge spermaphaga, sp. n., 

 reared from larvae in cones of Abies concolor. 



GiRAULT (A. A.). New Australian Chalcid-flies (Hymenoptera, Chalci- 

 didae). — Insecutor Inscitiae Menstruus, Washington, D.C., v, 

 nos. 4-6 -& 7-9, April-June & July-September 1917, pp. 92-96 

 & 133-155. [Received 10th November 1917.] 



This systematic paper deals with 10 new genera and 44 species, 

 3.5 of which, together with one variety, are new. The species dealt 

 with include Coccophagus lejitospermi", sp. n., reared from galls on 

 Leptospermum flavescens ; Bardylis australiensis, How., from Myti- 

 Uspis on Euphorbia ; B. australicus, sp. n., reared from Aspidiotus 



