310 Journal New York Entomological Society. [VoLXXI. 



9. Elytral epiplenrje distinctly punctured at base ; prosternum and side pieces 



coarsely and moderately densely punctate approximatus Lee. 



Elytral epipleura not punctured at base ; prosternum and side pieces 



sparsely punctured 10. 



10. Elytra piceous, unicolored ; form rather convex remotiis Lee. 



Elytra piceous with two oblique reddish spots ; form slightly depressed. 



minutus Mann. 



Rhizophagus sayi n. n. 



Rhizophagus bipunctatus Say. 



Journ. Acad. Nat. Sciences Phil., Vol. HI, p. 324. 



The specific name is used in this genus by Herbst for a European 

 species. 



This species and cylindricns are the only ones in our fauna having 

 the middle tibi?e armed with three rather long spines. 



Rhizophagus parallelocoUis Gyll. 



Ins. svec, Vol. IV, p. 638. 

 Rhizophagus robustns Schaef. 



Journ, N. Y. Ent. Soc, XIX, p. 118. 



Mr. A. Mecignon suggested in a letter to me the possible synonymy 

 of the above two species and kindly sent me this and other European 

 species of Rhizophagus. Comparing a specimen of R. parallelocoUis 

 with my R. robustns^ his surmise proved to be correct. 



Rhizophagus grouvellei Mec. 



Bull. Soc. ent. France, 1913, p. 91. 



A recently described species, unknown to me. However, it will be 

 readily known from our other North American species in having the 

 second elytral interval dilated and punctate at base, which puts it with 

 the European R. depressus Fab. in the subgenus Eurhisophagus. 

 Rhizophagus fenyesi Mec. 



Bull. Soc. ent. France, 19 13, p. 91. 



This species, unknown to me, was recently described. From the 

 description I was unable to find a good character to separate it from 

 R. brunncns, with which it agrees in the apparently ten-jointed an- 

 tennae, coarse punctuation, etc. 



Rhizophagus dispar Payk. 



Faun, svec. III, 1800, p. 328. 

 Rhizophagus dimidiatus Mann. 

 Bull. Mosc, 1843, p. 300. 



