Principal household insects of the United States . ough in somewhat lessnumbers than the preceding species. It presents two annual broodseven in the Northern States, the first appearing in June from eggsdeposited in May, and the second in August and September. It isabout the size of pellionella. The forewings are, however, uniformlypale ocherous, without markings or spots. Its larva feeds on a largevariety of animal substances—woolens, hair, feathers, furs, and in Eng-land it has even been observed to feed on cobwebs in the corners ofrooms, and in confinement has been successfully reared on th
Principal household insects of the United States . ough in somewhat lessnumbers than the preceding species. It presents two annual broodseven in the Northern States, the first appearing in June from eggsdeposited in May, and the second in August and September. It isabout the size of pellionella. The forewings are, however, uniformlypale ocherous, without markings or spots. Its larva feeds on a largevariety of animal substances—woolens, hair, feathers, furs, and in Eng-land it has even been observed to feed on cobwebs in the corners ofrooms, and in confinement has been successfully reared on this ratherdainty food substance. The report that it feeds on dried plants inherbaria is rather open to question, as its other recorded food materialsare all of animal origin. Frequently this species is a very troublesome pest in museums, par-ticularly in collections of the larger moths. Prof. F. M. Webster, ofWooster, Ohio, has had some of his large moths badly riddled by itslarva1, and Dr. Hagen also records it as feeding on insect FlQ. 26.—Tineola bi^clUclla: moth, larva, cocooiand empty pupa-skin—enlargeu (after Riley) SPECIES INJURIOUS TO WOOLEN GOODS, ETC. o7 Dr. Rileyreared it in conjunction with the angoumois grain moth (Sito-troga cerealella) from grain, it being apparent that its larvae had subsisted on dead specimens of the grain moth. It is very apt f attacklarge Lepidoptera on the spreading board, and has, in tad. been carriedthrough several generations on dried specimens of moths. Its general animal feeding habit is further indicated by the interesting case reported by Dr. J. C. Merrill, V. S. A., who submit ted a samplecan of beef meal which had been rejected as ••weevilly. The damageproved to be due to the larva of Tineola biselliella ami goes to sub-stantiate the theory already advanced that clothes moths were scaven-gers in their earliest association with man. The larva of this moth constructs no case, but spins a silky or moreproperly co
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