ENTOMOPHTHOREAE OF THE UNITED STATES. 



11)7 



Fig. 



203. 



Fig. 



204. 



Fig. 



205. 



Fig. 



206. 



Fig. 



207. 



Fig. 



208. 



Fig. 



209. 



Fig. 



210. 



b ig. 



-11. 



Fig. 



212. 



Fig. 



213. 



Figs. 214 



-216. 



Fig. 



217. 



Figs. 218- 



-219. 



Primary conidia from smnll gnat. 



The same from Tlirips sp. 



The same from a species of Musca. 



The same from an Ichneumon. 



The same from Colius philodice. 



The sumo from I'lujtonomns larva. 



The same from rose leaf-hopper (Typhlocyba). 



A primary conidium producing a capillary conidiophore on which is borne a mature secondary conidiuni 



of the second type. 

 The same. The secondary conidiuni in process of formation. 

 A secondary spore of the second type unusually long. 

 A secondary conidiuni of the second type of the usual form. 



Keating spores in process of formation from short liyphae, associated with a cross partition in eacli 

 case. 



Resting spore in process of formation from a single short hypha. 

 Mature resting spores. 



PLATE 18. 



Empusa (Entomophthora) Aphidis, figs. 220-240. 

 *Fig. 220. Compound conidiophore. 

 *Fig. 221. Cystidium. 



Fig. 222. Simple conidiophore : the protoplasm in the basidium has separated itself from the empty hypha below 



by successive cross partitions. 

 Figs. 223-23G. Primary conidia. 



Fig. 237. Two secondary conidia of the second type. 



Fig. 238. A primary couidium bearing a secondary conidium of the second type. 

 *Fig. 239. A liyphal body germinating in all directions. 



Fig. 240. A primary spore germinating in water, the protoplasm separating itself by cross partitions from the empty 

 hypha. 



Empusa (Entomophthora) dipterigena n. s., figs. 241-250. 

 Figs. 241-247. Primary conidia from a small fly, figs. 243 and 244 being characteristic of the species. 

 Fig. 248. Primary conidium bearing a secondary conidium. 

 *Fig. 249. Rhizoid with terminal expansion. The divisions of the expansion should be more truncate. 

 Fig. 250. A mature resting spore produced externally. 



Empusa (Entomophthora) virescens n. s., flgs. 251-261. 

 Fig. 251. Digitate conidiophore. 

 Figs. 252-259. Conidia. 



Fig. 260. Conidium which has been discharged without the rupture of the mother-cell wall which has merely 

 stretched. 



♦Fig. 261. Hyphal body germinating in all directions. 



Empusa (Entomophthora) Americana u. s., figs. 262-273. 

 A group of rhizoids. 

 Conidia. 



Two mature resting spores ; fig. 272 showing separation of the inner and the two outer walls. 



Empusa (Entomophthora) montana n. s., flgs. 274-285. 

 A digitate conidiophore produced directly from a cMamydospore. 

 Two cystidia. 



Terminal portion of a rhizoid showing its attachment to a bit of Sphagnum. 

 Gross appearance of the fungus many times enlarged. 

 Conidia. 



PLATE 19. 



Empusa (Entomophthora) echinospora n. s., flgs. 286-3*5. 

 Figs. 286-294. Conidia. 



Fig. 295. Terminal portion of a rhizoid. 



MEMOIRS KOSTON 80C. NAT. HIST., VOt. IV. -88 



*Fig. 262. 

 Figs. 263-271. 

 " 272-273. 



♦Fig. 274. 

 ♦Fig. 275. 

 ♦Fig. 276. 



Fig. 277. 



Figs. 278-285. 



