672 



THE SUBDIVISIONS OF THE VEGETABLE KINGDOM. 



insect, bud and 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 hyphse on the ventral side (fig. 383 1), thus rooting 

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

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

 conidia are abstricted and shot off" to some little distance (figs. 383 3- *. 6). A con- 



^;^?*S« 



Fig. 383.— Eatomophthoreee: Entomophthora and Empusa. 



I A caterpillar of tlie Cabbage-white Butterfly attacked by EntoTnophthora radicans. 2 The same caterpillar fully invested by 

 the Fungus. 8 Tufts of conidia-bearing hyphse from the baclc of the caterpillar. * Conidia separating from the tips of the 

 hyphse. 6 Disarticulated conidia. 6 a Fly attacked by Empusa Muscce. f Hyphse of Empusa Muscor, from the tips of 

 which conidia are being shot off. ' Conidium inclosed in sticky mucilage. 1, s, = nat. size; Sx80; *, ', 'x300; 8x630. 

 (After Brefeld.) 



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

 parthenogenetically. Empusa Muscce 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 off" 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. 



