208 DISEASES OF INSECTS. 
nected with the history of these animals. Mr. Dickson has 
described a Spheria under the name of entomorhiza that 
grows upon dead larve; it has a slender long stipes and 
spherical granulated head: on the pupa of a species 
of Tettigonia in my cabinet, another kind of Spherza, 
with a twisted thickish stipes and oblong head, springs 
up in the space between the eyes. I observed something 
similar but longer, in the grub of some large beetle in 
M. Du Fresne’s museum at Paris; and I have a memo- 
randum of having noticed something of the kind on the — 
rostrum of a Calandra. Bees and humble-bees have 
been sometimes thought to have some species of mucor or 
other Fungilli occasionally growing upon them; but 
Mr. Brown is of opinion that stamina which they have 
filched from flowers have been mistaken for these 
Fungilli, since he has detected those of Orchidee in - 
some of this tribe, and upon a beetle shown to him by 
Mr. MacLeay, one which he knew to be the stamen of 
an Aristolochia. I once observed a bunch of what I mis- 
took for a singular mucor that adorned the vertex of a 
humble-bee, between the antennze, which doubtless were 
of the same description; and I even saw one upon its 
wing. Upon a former occasion I mentioned a parallel 
circumstance with respect to a species of Xylocopa?. 
it. The animal parasites that infest insects are either 
themselves znsects; or worms. 
1. Their nsect infesters, as far as we know at present, 
are confined to the Orders Strepsiptera, Hymenoptera, 
Diptera,and Aptera: they attack them sometimes in their 
egg state, most frequently when they are larvee, occasion- 
ally when pupee, and very rarely in their perfect state. 
* Vor. HT. p. 336—. 
