224 THAXTER. 



compact receptacle. Primary appendage of two or three cells, the 

 distal brown and rounded, the middle, if present, distinguished by dark 

 septa. The cell next the subbasal producing the single perithecium, 

 the rest secondary appendages; which consist of a short basal cell, 

 distinguished above from a long claAate terminal cell by a broad dark 

 septum; the termination conspicuously swollen, darker brown than 

 the more slender portion below. Perithecium with a very short 

 abruptly narrow stalk, or almost sessile; long ovoid, bent to one side, 

 with brown, blunt termination. Perithecia about 30 X 15 /x. Pri- 

 mary appendage 9-12 X 5.5 )u; secondary 26-28 X ".5 n at tip. 

 Receptacle about 20 X 20 m more or less. 



On the inferior surface of a species of Uroscius. Baguio Mt., 

 Luzon, P. I. 



The mite bearing this \ery peculiar species was found in the sedi- 

 ment of a small lot of miscellaneous beetles kindly sent me b\' Mr. T. 

 V. Reed. The material is not abundant, but the form is very clearly 

 distinguished, by the character of its relatively short broadly clavate 

 secondary appendages, from any other with which it might be con- 

 fused. It is most nearly related to D. triangidaris. 



Dimorphomyces triangularis nov. sp. 



Male hidividiial. Receptacle two-celled, the basal cell long and 

 obliquely flattened, extending upward and outward beneath the 

 antheridium, which appears to be seated on its extremity: subbasal 

 cell oblique below; the appendage three-celled; the basal cell much 

 larger, as long as the second and third combined, the second distin- 

 guished above and below by dark septa, and tinged with brownish. 

 Antheridiimi sessile, the stalk-cell minute and triangular, nearly 

 straight on the inner side, the outer margin bulging prominently, the 

 neck relatively long, erect, strongly curved outward distally, and 

 faintly purplish. Antheridia 17 X 5.7 /x. Appendage 7.6 X 3.5 ;u. 

 Receptacle 11.5 X 7.5 n. Total length to tip of perithecium 32 fi. 



Female individual becoming unevenly tinged with brownish, usually 

 bent sidewise so that it lies flat on the substratum; the receptacle 

 small and compact, consisting of five or six cells, including the basal 

 which extends out below the secondary portion; the subbasal cell 

 larger than the others, bearing the stout usually three-celled primary 

 appendage, its basal cell broad and vmdistinguished, the two others 

 subequal, abruptly much smaller, separated by a narrow black 



