40 Bulletin 313 



Coi<DYCEPS MiLiTARis (L.) Link. — On buried or partially buried 

 insect pupa. Seaver (Mycologia, v. 3, p. 209, 1911) describes this 

 species as follows : "Sclerotia formed in the pups of insects, com- 

 pact, white, conitlial stage (Isaria) rising from the sclerotium, 

 consisting of a slender stalk, and a white, fioccose, feather-like 

 head; stromata at- maturity consisting of a sterile stem and fertile, 

 clavate head, usually a simple but more rarely forked or branched, 

 the whole often attaining a height of 4-5 cm. but often much shorter, 

 bright-orange; i):rithecia thickly scattered or crowded, for the most 

 part witli tlie necks protruding, or superficial (especially in weath- 

 ered specimens); asci cylindric ; spores filiform, nearly as long as 

 the ascus, many-septate, breaking apart at the septa, giving rise to 

 numerous subellipsoid segments 2-3 /x long." 



162. Infected larva and mature plant. 163. Part of ascns containing spore, 

 1/12. 



CoRDYCEPS SPHINGUM (Schw.) B. & C. — On dead insect larv« 



within the cocoon. Seaver (Mycologia, v. 3, p. 216, 1911) describes 



this as follows : "Stromata numerous, as many as thirty often 



springing from a single sclerotium, very slender and thread-like, 



about 5 cm. high and 1 mm. in thickness, cinerous, smooth or 



slightly pruinose, enlarged at the base, more or less bent above; 



perithecia subsuperficial, subconic 25-150 x 200-225 [x, brownish, 



asci elongate, cylindric ; spores filiform, as long as the ascus, about 



2 p. thick." 



164. Infected lar\a in cocoon and mature plant. 165. Ascus containing 

 spores, 1/12. 



Plowrightia morbosa (Schw.) Sacc. — On the stems of plums 

 and cherries. Causes black, unsightly, wart-like enlargements of 

 the affected parts and frequently results in death. The young knots 

 are formed in the spring and are greenish and bear the conidio- 

 phores and conidia {Cladosporium) . The conidiophores are erect, 

 simple, septate and 40-60 x 4-5 fi ; the conidia are light brown, obo- 

 vate, unicellular and about 6-8 x 2-5 /x. The mature knots are 

 black, tubercular, conspicuous, extremely variable in size, the peri- 

 thecia are formed late in the summer or early winter, scattered, 

 sometimes suppressed ; asci about 120 /jl in length, containing 8 

 spores which are obliquely uniseriate, and 16-20 x 8-1 fi; paraphyses 

 present. (See Ann. Mycol., v. 13, p. 663, 1915.) 



166. Infected cherry twigs showing conidiophore stage. 167. Conidiophores 

 and spores, 1/12. 168. Infected cherry twig in advanced stage. 169. Cross- 

 section of stroma showing perithecia. 170. Asci and ascospores, 1/12. 



