1910.] NATURAL SCIENCES OF PHILADELPHIA. 429 



ceous washed distad with brownish; face more or less completely seal 



brown, usually pale ventrad of line between 



antennae. 



Measurements. — d\ Length of body 16-19 



mm.; length of pronotum 4-4.8; greatest Figs. 11 and 12.— -/.sc/t- 



; ° L ° no pier a pensijlvani- 



width of pronotum 5.2-5.8; length of tegmen ca incequalis (S.-Z.). 



17-22.5; greatest width of tegmen 5.2-6.5. % lv , m :?? al ¥*n*,£ 

 o O (X4) and ¥ (3). 



9. Length of body 13.5-15.5 mm.; length of Male; Columbus , 

 pronotum 4.5-5; greatest width of pronotum Tex.: female; Piano, 



6-6.5; length of tegmen 6.2-1 1; 16 greatest 

 width of tegmen 4-4.5. 



Distribution. — From the material in hand and undoubted references 

 this form is known to range from Minnesota, Illinois, Indiana and 

 Nebraska south to northern Mexico, having been recorded from 

 Iowa, Kansas, Oklahoma and Texas in addition to the States pre- 

 viously mentioned. It is quite probable that this race will be found 

 to occupy the greater portion of the Mississippi Valley, intergradating 

 to the east with /. pensylvanica and westward extending to the edge 

 of the Great Plains, penetrating the sandhill country of Nebraska 

 along the river valleys, as records from Badger and Valentine testify. 

 Typical material has been examined from Crawford, Lake, Marshall, 

 Marion and Vigo Counties, Ind. Other material from Crawford County 

 approaches /. pensylvanica. Its vertical distribution appears to be 

 from near sea-level (Columbus, Tex.) to the above mentioned Nebraska 

 localities, situated two thousand to two thousand five hundred feet 

 above the sea. Its seasonal appearance extends from May to Sep- 

 tember according to data in the material examined. 



Remarks. — The typical condition of this race is rather decidedly 

 marked and but for the presence of intermediate material it would 

 have to be considered a valid species. However, the testimony 

 of such material as we have been able to examine from Indiana 

 demonstrates intergradation with the eastern and northern /. pensyl- 

 vanica. There is no doubt about the identity of Scudder's Temnop- 

 teryx marginata with this species, as the description absolutely fits 

 the adult female, but unfortunately a prior Ischnoptera marginata 

 (Brunner, 1865) precludes the use of the name for this species. 



Specimens examined. — Thirty-seven ; nineteen males, eighteen females : 



Minnesota. One male. (Bruner Collection.) 



St. Joseph, 111. One female. (U. S. N. M.) 



Illinois. One male. (A. N. S. P.) 



10 The maximum measurements are only found in Steuben and Crawford County, 

 Indiana, specimens. 



