pli.al., wing folded 



pro'nt., pronotum 



pro'nt.a., anterior margin of pronotum 



prx., proximal 



pullv., pulvillus 



rt., rectum 



seg.tar., segments of tarsus 



sn.p., posterior, or elytral, sinus 



sn.if., inferior sinus 



sp'ctj., cyst of first spermatocyte gen- 

 eration 



sp'd., cyst of spermatid 



sp'go'^., cyst of 7th generation sperma- 

 togonia 



sp'go^., cyst of 8th generation sperma- 

 togonia 



sp'go.^pr., primary spermatogonia 



sp'go.scd., secondary spermatogonia 



spi.t., terminal spines of tarsus 



sp'zo., cyst of spermatozoa 



tb.Mpg., Malpighian tubule 



te., testes 



tib., tibia 



v., ventriculus 



va. df., vas deferens 



vrt., vertex 



x,x., proximal ends of chromosome 



X, sex chromosome 



/., primary split of chromosome 



II., secondary split of chromosome 



I, abnormal no. 1 chromosome 



PLATE 1 



EXPLANATION OF FIGURES 



1 to 5b, 9a, 9b are from Hancock ('02). Figure 6 is from Otto Lugger's 

 'The Orthoptera of Minnesota.' 7 and 8 are from J. McNeill's 'Truxalinae of 

 North America.' 



la, lb Acridium granulatus Scudd. Female. 

 2a, 2b Acridium obscurus Hanc. Female. 

 3a, 3b, and 3c Acridium granulatus Scudd. 

 3c Lateral view of tarsus of A. granulatus. 

 4a, 4b Acridium incurvatus Hanc. 

 5a, 5b Paratettix texanus Hanc. 



6 Paratettix cucculatus Burm. 



7 Syrbula acuticornis Bruner, male, lateral view. 



8 Syrbula acuticornis Bruner, dorsal view. 

 9a, 9b Tettigidea jalapa Hanc, male. 



280 



