NEW LABOULBENIALES. 657 



On Sarcophagidae, Muscidac and AntJiomyidae. 



Stigmatomyces Limnophorae Thaxter. 

 Syn. St. Sarcophagae Thaxter. 



A very large series of this form has been obtained on a variety of 

 hosts, and from widely separated regions, and shows clearly that the 

 two species above indicated cannot be distinguished specifically. The 

 type of *S. Liitinophorac from California owes its apparent differences 

 to the fact that none of the individuals are fully matured, while a 

 majority are quite immature. Older individuals of this species often 

 attain a length of 700 /x, although on certain hosts they may be con- 

 stantly smaller, even when fully developed. The twist of the wall- 

 cells is usually hardly distinguishable as a slight obliquity in the venter; 

 while those of the neck may make a complete turn from base to apex, 

 the neck showing corresponding ridges in some cases, and occasionally 

 becoming rough-granular. The number of cells and antheridia in the 

 appendage varies somewhat, and the latter are often more or less 

 remote, owing to its considerable elongation; but the type is a clearly 

 defined one, which is found among other species only in S. verrucidosus. 

 The form of the venter of the perithecium also varies from that given 

 in my figures, in that the outline of its upper half is often character- 

 istically and symmetrically concave on either side. This is especially 

 true of individuals which occur on species of Lcucomelina, in which, 

 also, the perithecium as a whole may be somewhat sigmoid. 



Additional material has been examined as follows. On Lucilia dux, 

 No. 1763, Philippine Is., (Banks), and on what appears to be the same 

 host from Sumatra (Jacobson). On species of Leucovielina, Nos. 

 1734 and 1743, Mandeville, and No. 1860, Balaclava, Jamaica, W. I. 

 On Limnophora sp., No. 1644, Los Amates, Guatemala (Kellerman). 

 On Oncsia sp., Orizaba, Mexico (Mann). On undetermined genera of 

 Anthomyidae: No. 2811, St. George, Grenada, W. I.; No. 1881, 

 Troy, Jamaica, W. I.; No. 1817, Fayetteville, Arkansas; Nos. 2639, 

 2640, and 2646, Kamerun, West Africa. 



On Empididae. 



Stigmatomyces Drapetis nov. sp. 



Rather pale, becoming more or less suffused with dirty yellowish 

 brown, straight or somewhat curved. ]5asal cell of the receptacle not 



