Insect pests of food : The larvae of the Ptinidae associated with stored products / by S.M. Manton; and, The Histeridae associated with stored products, by H.E. Hinton.

  • Great Britain. Ministry of Food.
Date:
1945
Catalogue details

Licence: Public Domain Mark

Credit: Insect pests of food : The larvae of the Ptinidae associated with stored products / by S.M. Manton; and, The Histeridae associated with stored products, by H.E. Hinton. Source: Wellcome Collection.

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    - THE LARVAE OF THE PTINIDAE ASSOCIATED WITH STORED ? PRODUCTS. % By S. M. Manton, Sc.D. Fellow of Girton College, Cambridge. With an Introduction by. H.,. E.“ Hinton Pi-D: Depariment of Entomology, British Museum (Natural History). (Pls. III-IX.) . PAGE Introduction ... i ay aN ue a it bs Us ie Sam Explanation of terms used in the key ... ahs Wo an ae RDG ee Inter-generic and inter-specific differences ak oe a 346 Characters common to the Ptinid larvae referred to in the key ey Pe BAG Key to mature or nearly mature larvae ... See aH a we ar BAG Acknowledgment... oa & — Se ses Ws ohh MRE SE References .:; eh ae ie He era Ee at hss Sir BSE Introduction. In recent years much attention has been given by entomologists and others to the beetles of the family PrinrpAE because of the serious losses they cause to stored products, particularly cereals. The adults have been revised by ‘Hinton (1941), but no satisfactory key exists to the larvae. Only those of a few species have been described, and these descriptions are not sufficiently detailed to make it possible to identify the species concerned. By means of the keys and illustrations given here it should be possible to name with certainty the larvae of all the more economic- ally important species. . Altogether, fifteen species of Ptinids have been recorded attacking stored products in the British Isles or have been found in building structures where such products are normally kept. Of these, twelve, viz.: Ptinus tectus, Boield., P. hiriellus, Sturm, P. latro, F., P. fur, L., P. pusillus, Sturm, P. villiger, Reitt., P. raptor, Sturm, Niptus hololeucus, Fald., Trigonogenius globulus, Sol., Gibbium psylloides, Czemp., Tipnus unicolor, Piller & Mitt., and Stethomezium squamosum, Hinton, are included in the keys given below. An undetermined species, probably of Ptinus, which has been found on two separate occasions and is referred to as P. sp. indet., is also included. These twelve species include all those of any importance in this country and, with one or two exceptions, all species of any real importance else- where in the world. Three species, Ptinus exulans, Er., Eurostus hilleri, Reitt., and Mezium affine, Boield., which have been recorded in Britain as associated with stored products, are not included in the keys as no specimens were available. Of these three, the first has only rarely been introduced and is not yet established, the second has only recently become established here but appears to feed mainly if not entirely on rat and mouse droppings, and the third is sufficiently rare to be of little or no practical importance. Bred specimens of all of the species included in the keys have been available with the exception of Ptinus villiger, which has been included in the keys on larvae found associated with the adults in a sack of flour. Earlier instar larvae of only a few 49793 } A 2