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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    two to four diameters; and (4) surface between punctures on middle of disk be- tween first. and second intervals without a.visible (mag. x 75) microsculpture, whereas in D. punctatus there is here a very fine but distinct microreticulation. Q: Externally similar to male. ° 49 Fics. 49-51. Dendrophilus xavieri, Mars., male. (49) Lateral view of genitalia. (50) Dorsal | view of tenth abdominal tergite. (51) Ninth abdominal sternite. Comparative Notes: D. xavieri was sunk as a synonym of D. punctatus by Ross (1940), who appears to have been guided to some extent by a statement of Wenzel’s (1m litt.) that every gradation could be found between the two in a large series. I have been unable to find any significant gradation in the series of 33 specimens of both species before me. Moreover, as has been pointed out by Ross himself, the distribution of D. xavieri supports the view that it is a distinct species. D. xavien occurs on the Pacific Coast of N. America from Canada to California, while D. punctatus has not yet been found in this region and is, so far as is known, confined to the Eastern and Central United States. D. xavier has extended its range into the latter region but is there much rarer than D. punctatus. The male genitalia of the two species are nearly identical, and I have been able to find no differences. which can be considered to be of specific importance. A few specimens have been dissected of both species, and it appears from these that the anterior sides of the eighth abdominal tergite are not so strongly produced forwards in D. xavier as in D. punctatus. Distribution: Japan, N. America, England. Habits: Marseul (1873) records it in Japan at the foot of old trees and in the nest of a black ant. Ross (1940) records it in Vancouver in a culture of Tenebnio, etc. in bran and in rotting vegetation in San Francisco. During 1942-43, one was found on pumice in a Bristol warehouse, one in rotting grain in the basement of a London flour-mill, and four in a Liverpool flour mill. Carcinops quattuordecimstriata (Stephens) (figs. 52-53, 55). 1832. Dendrophilus quattuordecimsiriatus, Stephens, Brit. Ins., 5, Pp. 412. 1834. Paromalus pumilo, Erichson, in Klug, Jahrb. Insectenk., 1, p. 169. 1845. Hister nana, Leconte, Boston J, nat. Hist., 5, p. 61, pl. 4, f. 4.
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