14 PROCEEDINGS OP THE AMERICAN ACADEMY 



a jet-black disk, nearly opposite the base of the perithecium ; two in 

 number, their basal cells connected. The outer basal cell giving rise 

 to two branches ; an inner, once dichotomously branched, and an outer, 

 always simple. The inner basal cell very small, giving rise to sev- 

 eral short branches, slightly curved, often subclavate, sometimes once 

 branched, bearing numerous lateral or terminal antheridia. Recepta- 

 cle similar to that of the preceding species, the cells merely varying in 

 their relative proportions. Spores fusiform, septate near one extrem- 

 ity, involved in mucus, 40-50 /x X 4-5 fx. Length to tip of perithe- 

 cium 290 IX. Length of outer pseudoparaphyses 250-400 /a; of 

 inner 50-75 fx. Perithecia 110-130 {x X 50-65 fx. 



On Harpalus Pennsylvanicus. Connecticut; Maine (Kittery). 



A very pretty and distinct species, allied to the preceding ; but sep- 

 arable at once by the position and character of its pseudoparaphyses. 

 It is the only species observed by the writer, in which the sterile 

 pseudoparaphysis appears to be invariable in its mode of branching. 

 The species occurs in single tufts on the inferior surface of the thorax 

 of its host, always on the right side. 



