672 



THE SUBDIVISIONS OF THE VEGETABLE KINGDOM. 



insect, bud an i sprout there with great activity. Entomophthora radicans commonly 

 attacks caterpillars of the Cabbage-white (Pieris Brassicce). Having spread through 

 its interior, it sends out tufts of hyphee on the ventral side (fig. 383 ^), thus rooting 

 the caterpillar to the substratum. It now develops hyphse all over the body 

 wrapping up the caterpillar like a mummy (fig. 383 ^). At the tips of these hyphse 

 eonidia are abstricted and shot ofi" to some little distance (figs. 383 ^' *> ^). A con- 



Fig:. 383. — Entomophthorese : Entomophthora and Empusa. 



1 A caterpillar of tlie Cabbage-white Butterfly attacked by Entomophthora radicaiis. 2 xhe same caterpillar fully invested by 

 the Fungus. 3 Tufts of conidia-bearing hyphse from the back of the caterpillar. * Conidia separating from the tips of the 

 hyphse 6 Disarticulated conidia. ^ A Fly attacked by Empusa Muscw. 7 Hyphse of Empitsa Musece, from the tips of 

 which conidia are being shot off. * Conidium inclosed in sticky mucilage. 1,2,6 nat. size; *X80; *, *, 'x300; 8x630. 

 (After Erefeld.) 



jugation of branches sometimes occurs, whilst in other cases fruits are formed 

 parthenogenetically. Empusa Musece produces a disease common amongst flies in 

 the autumn. The Fungus having effected an entrance into the body of a fly 

 gradually fills it up with its sprouts. In due time tubes penetrate the surface and 

 develop conidia at their extremities (fig. 383^). These are shot oflT as in the last 

 case, and one may often see flies stuck to the window-pane in autumn surrounded 

 by a halo of these conidia (fig. 383 °). 



About 80 species of Entomophthorese are known. 



