Archive image from page 55 of American spiders and their spinning. American spiders and their spinning work. A natural history of the orbweaving spiders of the United States, with special regard to their industry and habits CUbiodiversity1121211-9770 Year: 1889 ( 54 AMERICAN SPIDERS AND THEIR SPiNNJNGWORK. blunt head of the larva was too large to make an attachment. When lull fed the larva was about three-eighths of an inch long, and had fourteen segments, counting the head as one. The cocoon was shuttle shaped, whitish and thin, the spider's original web forming its suspending cords; the
Archive image from page 55 of American spiders and their spinning. American spiders and their spinning work. A natural history of the orbweaving spiders of the United States, with special regard to their industry and habits CUbiodiversity1121211-9770 Year: 1889 ( 54 AMERICAN SPIDERS AND THEIR SPiNNJNGWORK. blunt head of the larva was too large to make an attachment. When lull fed the larva was about three-eighths of an inch long, and had fourteen segments, counting the head as one. The cocoon was shuttle shaped, whitish and thin, the spider's original web forming its suspending cords; the movements of the larva and pupa were perceptible through the cocoon. The perfect fly appeared on the 12th of June, and proved to be a female of Polysphincta tuberosa Gravenhorst. VII. Mr. John L. Curtis,1 of Oakland, California, has written me an inter- esting account of a new body parasite taken upon a species of Theridioid spider, Labulla The spider is quite Body Par- l • ., . common in the re- asite. gion surrounding San Francisco, and domiciles tt- in large leaves, the edges and ends of which it bends downward, and fastens with a sheet of web composed of many white threads spun across from side to side. The cocoon, which is round and white, is woven within this maze, and is jealously watched by the mother, a small spider of a light gray color, with pinkish tints on the legs and a tinge of yellow on the abdomen. On July 13th (1890) a specimen was found upon whose abdomen was fixed a large yellow larva. By the 15th the larva had entirely consumed the spider and spun itself into its cocoon. (Figs. 41, 42, 43.) On the 17th it changed to chrysalis, and on the 27th of the month hatched. The cocoon is a cylin- drical case of loose fibres, and hung suspended, head downward, upon lines stretched within the bottle wherein it was bred. Mr. E. T. Crcsson, of Phila- delphia, has identified the parasite insect thus hatched as a probably new species of Polysphincta, a genus
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