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 hyphae 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 hyphae 

 conidia are abstricted and shot off to some little distance (figs. 383 ^' *• ^). A con- 



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2 



r ^ 



'' • ■.,-5i?vriS 



Fig. 383.— Entomophthorese: Entomophthora and Empusa. 



' A caterpillar of the Cabbage-white Butterfly attaclied by Entomophthora radicans. » The same cateTpillar fully invested by 

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

 hypha) « Disarticulated conidia. ß A Fly attacked by Empuaa MusctX- ' Hyphse of Empusa SIvscce, from the tips of 

 which conidia are being shot off. * Conidium inclosed in sticky mucilage, i,^,« nat. size; »x80; *,*,?x300; *x630. 

 (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 eflfected 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 Eutomophthoreae are known. 



