106 



Goodrich (E. S). Note on the Hymenoptera parasitic on Beetles 

 infesting Grain. — Repts. Grain Pests {Way) Committee, Royal 

 Society, London, no. 9, December 1921, pp. 5-7. 



In discussing the parasitism of grain pests by Chaetospila elegans , 

 Westw., and Lariophagus disiingnendus, Forst., it is pointed out that 

 the most dangerous pests, namely, Rhizopertha dominica, F., Calandra 

 oryzae, L., and C. granaria, L., are fortunately those most commonly 

 attacked, generally in the larval, and occasionally in the pupal, stage. 

 The parasite absorbs the body contents of its host, which becomes 

 reduced to a brown and shrivelled skin ; the Chalcid then pupates 

 and eventually emerges as an adult from the grain. The Acarid that 

 causes the death of so many of the Hymenopterous parasites 

 [R.A.E., A, ix, 417], has now been identified as Pediculoides 

 veniricosus. There is evidently some factor that keeps this Acarid in 

 check, as otherwise it would exterminate both the weevils and their 

 parasites. Although these Hymenoptera are of valuable assistance in 

 reducing the numbers of the weevils, yet the results of the present 

 investigation do not indicate that they could successfully be used 

 in practice to control grain pests. 



Waterston (J.). Report on Parasitic Hymenoptera, bred from Pests 

 of Stored Grain.- — Repts. Grain Pests [War) Committee, Royal 

 Society, London, no. 9, December 1921, pp. 8-32, 15 figs. 



A list is given, compiled from many sources, of Hymenopterous 

 parasites that have been recorded from grain pests. During the 

 present enquiry, several hundred Pteromalids and Bethylids were 

 examined. 



As a result of this examination and of previous records, the species 

 bred from grain pests have been divided into three classes, viz., those 

 that have been erroneously recorded, those that were unrecognisable 

 or not represented in the material examined, and species actually 

 determined. The last-named include the Pteromalids, Bruchohins 

 laticeps, Ashm., Aplastomorpha vandinei, Tucker, Lariophagus dis- 

 tinguendus, Forst. [calandrae, How), L. piincticollis , Moll., and L. 

 utibilis. Tucker ; the Spalangiid, Chaetospila elegans, Westw., and the 

 Bethyhds, Rhabdepyris zeae. Turn. & Watrst., sp. n., and two un- 

 determined species of Cephalonomia. Descriptive notes and figures of 

 these species are given, as well as a key to facihtate recognition of 

 Pteromalids bred from Briichus, Calandra and Sitodrepa infesting 

 grain. 



DuRRANT (J. H.). Insects associated with Grain, &c. — Repts. Grain 

 Pests {War) Committee, Royal Society, London, no. 9, December 

 1921, pp. 33-52. 



From the examination of more than 500 samples of grain, a list 

 is given comprising 36 Coleoptera, 8 Lepidoptera and 10 Hymenoptera, 

 found in stored cereals, pulse, etc. These include pests, scavengers, 

 parasites and predators, and lists are given of the samples in which 

 they occurred and their geographical distribution. 



Calandra oryzae, L., C. granaria, L., Rhizopertha dominica, F., 

 and Trogoderma khapra, Arr., are known to be really serious pests 

 of grain, the first-named causing more loss than all the other grain 

 pests combined. Triboliwn castaneiim, Hbst., and T. conftiswn, Duv.,. 



