180 ROLAND THAXTER ON THE 



microscopically is in Dr. Hagen's collection of entomogenous fungi. I have collected it 

 frequently at Kittery and in the vicinity of Boston, and it has been sent to me from Jaffrey, 

 N. H. 



Empiisa (Entomophthora) montana nov. sp. 

 PI. 18, figs. 274-285. 



Conidia, ovoid to turbinate, usually tapering from a broadly rounded apex to a some- 

 what attenuated, slightly pointed base, containing numerous large oil globules and meas- 

 uring 11 X 18/^-15 X 25/x. Conidiopliores digitate, coalescing over the host in a livid 

 white mass and arising directly from rounded hyphal bodies. Cystidia tapering or rounded 

 at the apex, larger than the conidiophores. Secondary conidia like the primary or short 

 ovoid. Besting spores unknown. Host attached to substratum by numerous rhizoids. 



Hosts. Diptera: a minute gnat, apparently Chironomus sp. 



Habitat. Alpine summit of Mt. Washington, N. H. 



This small species was found late in August, 1886, in great abundance on a small gnat 

 common about one of the brooks running into the "Lake of the Clouds " on Mt. Wash- 

 ington ; several hundreds of specimens being obtained from the wet Sphagnum bordering 

 the brook. I have observed it in no other locality, even on Mt. Washington, although 

 thorough search was made in similar localities in other parts of the mountain. The species 

 presents no peculiarities of interest beyond the shape and size of its conidia which are 

 readily distinguished by their usually pointed base and broad apex which give them the 

 appearance of a long top. 



Empusa (Entomophthora) echinospora nov. sp. 

 PI. 19, figs. 286-305. 



Conidia ovoid, tapering to a papillate base ; usually nearly symmetrical ; 20-25 x 10-14/1 ; 

 containing one or more large oil globules. Conidiophores digitate, coalescing into a mat- 

 like covering which turns rust colored on exposure. Cystidia not observed. Secondary 

 conidia like the primary or varying only slightly. Besting spores, zygospores, spherical 

 30-40/^ in diameter, the exospore spinose ; commonly produced externally as well as in- 

 ternally, and in the former case held slightly, after maturity, by a delicate mesh of hy- 

 phae. Host attached to substratum by rhizoids, coalescent around the abdomen in the 

 conidial form. 



Host. Diptera : imago of Sapromyza longipennis and rarely other smaller Diptera. 



Habitat. Maine, !N^ew Hampshire, North Carolina. 



A single specimen of this interesting species containing both resting spores and conidia, 

 together with several examples that were useless from exposure, were found in August, 

 1886, among the alders at the head of Tuckerman's ravine, Mt. Washington, on the pretty 

 yellow- winged fly that appears to be its almost invariable host. The conidia so nearly 

 resembled those of H. Americana and JE. dipterigena that it was only by accident that 

 I examined the specimen a second time after having placed it with ray material of these 



