Insect pests of food.

  • Great Britain. Ministry of Food.
Date:
1943]
Catalogue details

Licence: Public Domain Mark

Credit: Insect pests of food. Source: Wellcome Collection.

    133/160 (page 123)
    17. Maxillary palpi very short and inconspicuous (fig. 202). Upperside forewing pale ochreous buff and entirely unmarked. Tineola bisselliella (Hummel) (pl. v. fig. 18 g, 19 9). (5:0—7-5 mm.) NEMEC a Ts oP ieCAN er sek co Sidi dal area iagss Ce Ws Phan ty sr ete wig and Sls 2: aoene Tinza Geoff. 18. Upperside forewing with a dark reddish brown or chocolate-brown angled medial stripe or fascia: Male clasper with an arm-like projection arising from the surface. Female bursa copulatrix without signa................ Upperside forewing without a distinct dark medial stripe or fascia. Male clasper without such a projection. Female bursa copulatrix with signa in CR ae Arata Shah Rarer Miciiaie ls) aaravan aie © Memiate «+ Ca ees ae, 0 alee ee 19. Upperside forewing white with a reddish brown angled medial stripe from costa to dorsum, Tinza arcella Fab. (pl. v. fig. 20 g, 21 9). (6-0-7-0 mm.) Upperside forewing not pure white and with a chocolate-brown angled medial fascia, consisting of three irregular contiguous or conjoined spots, as well Bennet reg Ae DTOWN) MALKINGiban wee see ie se Pte dink eee a eae a eee ele 20. Upperside forewing ground colour pale reddish buff, with a faint golden sheen, im some examples flecked with white, and the dark brown markings not strongly contrasted with the ground: in many specimens, the markings in the basal and distal areas are almost obsolete. Male clasper approximately triangular. Female ostium bottle-shaped. , Tinga ruricolella Staint. (pl. v. fig. 27). (5-0—7-0 mm.) Upperside forewing ground colour white or whitish, with the dark chocolate- brown markings strongly contrasted with the whitish ground; basal and (eval areas always with dark markings io). 2)... setae ae eek se bee oe 21. Upperside forewing with the large dark spot at the cell-end with its lower edge prolonged basally to form a dark streak. Male clasper with a prominent shoulder, and uncus with two small projections. Female ostium cup-shaped and not much broader than the ductus burse. Tinza cloacella Haw. (pl. v. fig. 26). (6-0—7-0 mm.) Upperside forewing with the large dark spot at the cell-end with its lower edge not prolonged basally to form a dark streak....... 2... cc eee cence eee eee 22. Upperside forewing ground colour whitish buff ; the six or seven dark chocolate- brown costal spots clearly defined, more or less equally prominent, regularly spaced, and with a tendency to be outlined with whitish, and with the basal costal spot not larger than the sub-basal costal spot ; the dark oval spot near the centre of the dorsum with its lower edge clearly defined and faintly outlined with whitish ; the small dark rounded spot at the base of space 4 obscure or obsolete and not lying in a whitened area. Forewing fringe not con- spicuously streaked with white. Male clasper distally truncated, gnathos not serrate. Female ostium cup-shaped and twice as broad as the ductus / bursee. Tinea granella (L.) (pl. v. fig. 25). (5-0—7-0 mm.) Upperside forewing ground colour pure shining white; the dark costal spots less prominent and regular than in 7’. granella, and with the basal costal spot produced, roughly resembling an isosceles triangle with its base on the costa and much larger than the sub-basal costal spot; the dark spot near the centre of the dorsum smaller, and usually narrower and elongate ; the small dark rounded spot at the base of space 4 usually prominent and lying in a circular white patch. Forewing fringe strongly streaked with white. Male clasper with apex strongly produced, gnathos deeply serrate. Female ostium suggests a pair of spectacles. Tinea infimella H.-Sch. (pl. v. fig. 22 g, 23 9, 24). (5-0—7-0 mm.) 23. Coteus forewing pale greyish buff or buff brown, with a silken sheen, not dark dusted or only sparsely so, and the costal mar gin not chequered. Upperside forewing with three dark spots usually present, these comprising a round spot at the cell-end, and two short stripes, placed one above the other, in the medial area. Male saccus much longer than the clasper, which is simple BMG rovebly OVAL INNES 2 i.29 = Wares «ash ond Miele sia Wane «ely inl ater ae 4 1a) Upperside forewing heavily dark dusted and the costal margin chequered. Male saccus not longer than the clasper, which is not simple .............. 24, Upperside forewing with a dark streak along the basal half of the sub-dorsal fold. Length of forewing usually greater than 7-0 mm. Male cornuti comprise a bundle of five or six short, stout spines of length not greater than the diameter of the edeagus. Female anterior apophyses markedly longer than the posterior apophyses. Tinga pallescentella Staint. (pl. v. fig. 34 g, 35 9), (7-0-12-0 mm.) 123: 20. 21, bo bo 24, 27.