116 Journal New York Entomological Society. [Vol. xxiii. 



Such differences are mere individual variations, as found frequently 

 in the series before us. 



So very wide a distribution is very unusual, but such has been 

 found to occur likewise in Gryllotalpa hexadactyla, and evidence is 

 at hand of still other species which range from temperate North 

 America through the tropics to temperate South America. 



It is of interest to note that the present species is probably found 

 in largest numbers in temperate regions, where no macropterous in- 

 dividuals have been found, but that among the limited series before 

 us from tropical America three are macropterous and in these the 

 internal face of the cephalic tibiae bear a large membranous tym- 

 panum, this place being not defined or merely indicated by a slight 

 unmodified depression in the great majority of the large series of 

 micropterous individuals before us. The exceptions among the mi- 

 cropterous series which exhibit a small membranous foramen in this 

 position appear to be found chiefly among megacephalic individuals. 



This, the heaviest species in the genus, which shows the nearest 

 approach to the type found in Grylhis, is the most widely distributed 

 and also the most plastic of the species of the genus. The features 

 most worthy of remark are as follows : average size large for the 

 genus, rather small when compared with Gryllus; form robust and 

 compact. Head large with occiput rounded and but little flattened to 

 the broad inter-antennal protuberance, frequently marked proximad 

 with narrow parallel lines, supra-ocular pair often extending to the 

 lateral ocelli, lines between these with but rare exceptions very brief, 

 terminating at crest of occiput. In intensive condition of coloration 

 all trace of cephalic marking is lost, entire head being shining black. 

 Maxillary palpi rather heavy, with distal joint obliquely truncate, this 

 truncation extending over two-thirds to three-fifths of ventral margin; 

 palpi vary in color from a pale yellowish type (in palest specimens) 

 through one in which distal segment is darkened (normal) to one in 

 which they are entirely darkened (extreme of intensive coloration). 

 Tegmina in both macropterous and micropterous males narrowing 

 more gradually distad than in lineatus, with texture less delicate and 

 veins heavy and well defined in both sexes. Number of transverse 

 veins in male normally two, very rarely one or three. Micropterous 

 females have tegmina decidedly aborted and broadly rounded, nor- 

 mally attingent mesodorsad but occasionally overlapping or separated 



