PSYCHE. 



THE SPECIES OF GRYLLUS FOUND IX THE UNITED STATES EAST 

 OF THE SIERRA NEVADAS. 



BY SAilUEL H. SCUr)DER. CAMBRIDGE. ilASS. 



In 1862 I recorded in New England 

 and the region not far distant from it six 

 sp)ecies of Gnllus of which two were 

 described as new, both from New Eng- 

 land. These species supposed to be 

 new have been little recognized since 

 and may now be definitely regarded as 

 sjTionyms. The results of a recent study 

 of material from over the whole of the 

 United States, amounting to nearly a 

 thousand specimens, are brought forward 



in this and a companion papver (Psyche. 

 ii, 267) on the genus Grj-Uus as found 

 on the Pacific coast. Most of the spe- 

 cies are extremely difficult to separate. 

 So far as I can discover, there are but 

 three Sf>ecies in the northern and central 

 United States east of the Mississippi.* 

 I^ch of these, but in differing degrees, 

 develops both macropterous and bra- 

 chypterous forms and may be separated 

 by the following table : — 



a ^. Black species, the t^^ina and parts of the body sometimes testaceous ; first 



joint of antennae not projecting beyond the front of the head. 



b ^. Larger, more frequently with testaceous tegmina. the male relatively stouter 

 with larger and broader head, the female with ovipwsitor nearly, quite, or more 

 than, half as long again as hind femora .... abbrcviatus Serv. 



b-. Smaller, more frequently black throughout, the male relatively slenderer 

 with narrower and less tumid head, the female with o\-ii)ositor rarely more than 

 one fourth as long again as hind femora. . . . pennsylramcus Barm. 



a ^. Straw-colored with light fuscous markings : first joint of antennae projecting 



slightlv bevond front of head. ...... dotmsticus Linn. 



The separation of the first two sj>ecies 

 is a difficult task, and I have been un- 

 able in all cases to place specimens, 

 especially of the male sex. The charac- 

 teristics given in the table have there- 



fore of necessity been stated in a rather 

 general form. G. abbrciiatus has for 

 svnon\Tns G. luetuosus Serv.. G. angustus 



* Excepnng tfca 

 desci^Kd farther ; 



