672 



THE SUBDIVISIONS OF THE VEGETABLE KINGDOM. 



insect, bud ani 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 ^), thus rooting 

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

 wrapping up the caterpillar like a mummy (fig. 383 2). At the tips of these hyplLi? 

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



.^^f'l' ^f !f -, 





f 



Fig. : 



-Entomophthorese : Entomophthora and Ernpusa. 



' A caterpillar of the Cabbage-white Butterfly attacked by Entomophthora radicans. 2 The same caterpillar fully invested by 

 the Fungus. » Tufts of conidia-bearing hypha; from the back of the caterpillar. ■» Conidia separating from the tips of the 

 hyphae. s Disarticulated conidia. « A Fly attacked by Ernpusa Muscce. ' Hyphse of Empxtsa Mxtscce, from the tips of 

 which conidia are being shot off. * Conidium inclosed in sticky mucilage. 1,2,6 uat. size; ^xSO; S','x300; «xC30. 

 (After Brefeld.) 



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

 parthenogenetically. Ernpusa 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 ofl" 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 Entomophthoreae are known. 



