entom6phthoreae of the united states. 187 



growth, already described in the last-named species, which characterizes the mass of co- 

 nidiophores as a whole, and allows the basidia to assume a vertical position which is 

 impossible in the rounded masses of the usual type. 



In material of this species, where the growth of conidiophores has not been luxuri- 

 ant, the form of the conidia may be constantly such as is represented in figures 403- 

 404; in fact the majority of the specimens obtained from Mt. Washington produced 

 spores of this nature. The affected hosts occurred in this locality on moss along the 

 borders of small brooks in the Alpine Garden, and only when the moss was completely 

 saturated with water, allowing an abundant growth of conidiophores, were the spores 

 of the usual elongate type. I have thought this worthy of mention, since the small 

 form might readily be taken for a distinct species. Although occurring in considerable 

 quantities on Mt. Washington, the species is somewhat rare in North Carolina where it 

 is found in company with E. variabilis on saturated wood or stones in the beds of brooks 

 flowing through woods. It may be readily distinguished from the last-named species by 

 the clear white color of the mass of conidiophores. 



The resting spores I have found in but few specimens, produced simultaneously with 

 the conidia by a process exactly similar to that described in IE. sepulchralis. 



This completes the enumeration of American Empusae at present known, and for con- 

 venience of reference I have added below a list of the European species which are 

 unrecorded from this country. 



European species of Empusa as yet unrecorded from the United States. 



Empusa Jassi, Cohn I. c. B, p. 77. Sorokln I. c. C, p. 239. Schroeter I. c, p. 222. 



This form, of which no complete description has ever been published, is referred to by 

 Cohn (I. c. B, pp. 76-77) in connection with his account of TaricTiium megaspermum. 

 In this place he mentions that the spores are spherical and 20,^ in diameter, but gives no 

 specific name to the form, which, he states, occurs on Jassus 6-notatus. Where the name 

 Jassi first originated I am unable to say, and the species cannot be recognized without 

 further information regarding it. It may prove to be the species previously described as 

 E. a2}iculata which has many hosts, and it forms another element of confusion in the 

 group comprising E. conglomerata, E. Planchoniana, E. apiculata, E. Jassi and per- 

 haps E. Tenthredinis. I quote below the note of Schroeter in his Silesian flora concern- 

 ing this species. 



" 330. Empusa Jassi, Cohn, 1870. Mycel im Korper von Cicadbn lebend, an den 

 todten Thieren als sammetartiger, weisser Schimmeliiberzug hervorbrechend. Conidien 

 kugelig, 20/t Dchm. 



Auf Jassus sex-notatus Mai, Juni. — Die todten Thiere haften den Grashalmen u. s. w. 

 fest an, die vier Eliigel wie zum Pluge ausgespreizt. — Breslau Schneitig 1869 in grosse 

 Menge." 



Entomoplithora colorata Sorokin, Z. c. C, p. 215, figs. 573, 623, 627; I. c. D, p. 62, PI. iii 

 figs. 5-Q, 19-27, PI. IV, figs. 28, 28'. 



