432 PROCEEDINGS OF THE ACADEMY OF [April, 



marked mesad with vandyke brown, extending from interocular 

 space to mouth parts, usually involving latter. 



Measurements. — d\ Length of body 13.5-17.5 mm.; length of 

 pronotum 3.5-4; greatest width of pronotum 4.5-5; length of tegmen 

 15.8-18.5; greatest width of tegmen 4.8-5.5. 



$. Length of body 11.5-16.5 mm.; length of pronotum 3.8-5; 

 greatest width of pronotum 5-6; length of tegmen 7-9; greatest width 

 of tegmen 3.5-4.8. 



Distribution. — Available data show that the present species ranges 

 from Southern New Jersey (Anglesea) to Georgia, west to North 

 Mexico, and northward in the Mississippi Valley at least as far as 

 Northwestern Tennessee (Rives). The data are so meagre that 

 almost no idea of its vertical range can be formed. 



The dates on the material range from M&f 22 to July 23. 



Remarks. — After careful comparison this name has been placed 

 on this species and in all the characters but two given in the brief 

 original diagnosis the males in the present series agree, the two being 

 the number of rami of the ulnar vein of the wing and the shape of the 

 supra-anal plate. Saussure and Zehntner give for the former "ramis 

 apicalibus 3, incompletis 1-2, i?istructa," the latter holding true for 

 the material in hand (three sometimes present), but the number of 

 complete rami is four to six, suggesting that even greater variability 

 than our specimens exhibit is present in the species, or that the original 

 "3" was a typographical error for five. Regarding the supra-anal 

 plate, it is produced to a certain extent mesad with the margin rotun- 

 dato-truncate, and Saussure and Zehntner's u lamina supra-anali 

 rotundata" probably means in contradistinction to the more markedly 

 trigonal form found in some species of the genus. 



This form is very closely related to /. pensylvanica, but what position 

 it should bear in reference to the latter species can only be determined 

 when more material and information is available. The very pale 

 color or almost absence of coloration, combined with the decided 

 pronotal maculation makes the males appear quite distinct while the 

 supra-anal plate has a different facies, although the form of the latter 

 portion is occasionally approached in otherwise quite typical pensyl- 

 vanica. The tegminal characters of the female, the form of the 

 pronotum and of the subgenital plate differentiate that sex, although 

 some individuals of pensylvanica are hard to separate. However, 

 no female individuals of the latter species have been seen with 

 tegmina as short or as acute or with a subgenital plate as blunt and 

 as sinuate laterad as in divisa. 



