REHX AXD HEBARD 75 



Further measurements of specimens from Deming, New Mexico, and Florence, 

 Arizona, have been given by Rehn and Hebard,^^ but no geographic increase or 

 decrease in size over certain portions of the insects range can be admitted. 

 The large series now before us shows numbers of large and small individuals 

 from the same locality from various portions of the range of the species. 



\yhen compared with its western race, /. elegans consuetipcs, this form 

 is seen to have, as a rule, considerably less attenuate proportions. 



Color Notes. — General color of in.sect pale bice green, in dried 

 specimens this color has almost always faded to mummy brown on 

 the body and proximal portions of the appendages; eyes wood 

 brown. A dark brown maculation is almost invariabh^ present 

 on each side of the fourth dorsal abdominal segment near the caudal 

 margin, which margin caudad of this maculation is buffy. Caudal 

 extremity of anal field of tegmen usually marked with a small dark 

 spot. The pale bice green general coloration of the tegmina be- 

 comes much paler along the veins which approach the sutural 

 margin diagonal^, and between these the coloration is frequently 

 intensified and sometimes very minutely speckled with brown; 

 this gives the tegmina a distinctive "herring-bone" pattern in the 

 present form. This color pattern ranges from a very pronounced 

 type to one quite as immaculate as in I. elegans consuetipes. The 

 specimens of the very pronounced "herring-bone" pattern before 

 us are from Brewster County, Texas, and Pima County, Arizona, 

 The great majority of the series have this pattern moderately 

 indicated while a very few specimens from San Antonio, Cotulla 

 and Uvalde, Texas, are immaculate. There are four specimens be- 

 fore us which have the general coloration very pale buff and in 

 these the "herring-bone" pattern is very faint; these individuals 

 are from Del Rio and Neville Spring, Texas and Deming, New 

 Mexico. 



The opinion expressed bj^ Rehn and Hebard that "this species 

 is exceedingly variable in coloration" was caused by specimens of 

 the very different and strikingly colored /. covilleae being confused 

 with the present species. As is found in many species of Orthop- 

 tera, there is a great amount of variation in the intensification and 

 recession of the color pattern of elegans, but when this pattern is 

 present it is almost uniform, the onl}' differences being found in the 

 fact that in some specimens all of the veins which approach the 



'^ 1909. Proc. Acad. Xat. Sci. Phila., 1909, p. 167. 



TRAXS. AM. ENT. SOC, XL. 



