478 PEOCEEDINGS OF THE ACADEMY OF [Juiie, 



the rest of the head. Eyes very dark brown. Maxillary palpi 

 cream color, the first three segments and base of the fourth much 

 suffused with very dark brown, terminal segment cream color with 

 the immediate apex very dark brown. Pronotum very dark mummy 

 brown, shading to almost black on the lateral lobes. Tegmina of 

 both sexes dark mummy brown, shining, transparent ; intermediate 

 channel of the same color as the other portions. Limbs raw umber, 

 above very slightly maculate with mummy brown. Under portions 

 of limbs and body raw umber. Entire dorsal surface of abdomen of 

 male (concealed) and concealed portion of same in female very dark 

 brown, polished; exposed portion of same in female very dark mummy 

 brown marked with four regular rows of small raw-umber spots. 



In the large series of specimens before us there are many some- 

 what paler or darker than those here described. In the lighter 

 specimens the dark lateral lobes of the pronotum are usually much 

 more noticeable and the spots on the exposed dorsal surface of the 

 abdomen in the female are more distinct. The pale color of the 

 maxillary palpi is more yellowish. 



The darker specimens are often almost black on the dorsal surface, 

 the ventral surface mummy brown. The spots on the exposed 

 dorsal surface of the abdomen in the female are greatly reduced or 

 wholly absent. The pale color of the maxillary palpi is almost 

 always white with no yellowish suffusion. 



The markings of the maxillary palpi in this species varies from a 

 type having the apical half of the ultimate joint darkened, to one 

 which bears only a trace of this dark coloration at the extreme apex; 

 this trace of darker coloration is never missing, however, and serves 

 as a character to separate this species from A'', confusus. 



Distribution. — This insect is known from the province of Quebec 

 to the most southern portion of the mainland of Florida, and 

 west to the great plains and the mesquite region of Texas. 



Aside from N. fasciatus and its southern race, this species is 

 the most abundant of the genus over almost its entire range. Only 

 in extreme southern Florida is this not true, where N. cuhensis 

 is the most plentiful of the species of the genus. The present 

 insect may be found in a great variety of situations; it appears 

 to prefer thick grasses growing along the edges of woodlands, 

 the leaf-covered almost bare ground about streams and ponds 

 in heavy woods, dark swamps, or marsh land under cat-tails. The 

 song is a high-pitched and continuous trill, more pleasant to the 

 ear than that of N. fasciatus. The majority of southern macropterous 



