OF ARTS AND SCIENCES. 33 



hyaline base; sub-basal cell flat and almost obsolete. Terminal 

 and subterminal cells together forming a straight finger-like pro- 

 jection as long as or longer than the perithecium. Spores 33-37 

 X 2.5-3 ix. Perithecia 65-90 X 30 fx. Total length to tip of peri- 

 thecium 150-180 fi. Basal cell 90-110 fx. 



On Laccophilus maculosus, Connecticut. 



This species is confined to the median inferior anal plate of ks 

 host, and has only been observed upon males. It is not to be con- 

 fused with any other species, being distinguished by its elongated 

 basal and apical cells, almost black and white color, and papillate 

 divergent perithecium. 



Heimatomyces rhynchostoma, nov. sp. 



Evenly suffused with yellowish brown. Perithecia relatively 

 large, abruptly hooked at the broad apex, so that the papillate tip 

 is turned inwards and is lateral in position. Basal cell of recepta- 

 cle comparatively short, slightly inflated: sub-basal cell flattened: 

 terminal and subterminal cells forming an outwardly curved, finger- 

 like appendage exceeding the perithecium; the subterminal cell 

 continued into a short well marked hook. Spores 26 X 3 fx. Peri- 

 thecia 75 X 22 fx. Total length to tip of perithecium 100 fx. Basal 

 cells of receptacle 25-30 fx. 



On Laccophilus maculosus and Hydroporus spurius, Connecticut. 



Occurs rather rarely on the margin of the right elytron, from 

 the surface of which the perithecium projects in a characteristic 

 fashion. The broad hooked apex of the perithecium and the finger- 

 like development of its distal portion distinguish this species from 

 any other form. 



Heimatomyces uncistatus, nov. sp. 



Evenly suffused with pale yellowish brown. Perithecia large, 

 curving evenly inwards to the somewhat pointed apex. Basal cells 

 of the receptacle rather slender, the terminal cell pushed to one 

 side and bent past the apex of the perithecium by a somewhat 

 indurated, blunt, hooked outgrowth from the subterminal cell. 

 Perithecia 75-85 X 20 fx. Total length 110-130 fx. Basal cells 

 of receptacle 37 fx. 



On Laccophilus macuiosus and Hydroporus spurius, Connecticut. 



A rather rare species, occurring in groups on the inferior surface 

 of the abdomen of its host, and distinguished by the peculiar 

 development of the subterminal cell of the receptacle. 



VOL. XXVII. (n. 8. xix.) 3 



