100 THE CANADIAN ENTOMOLOGIST. 



Ere.mopedes Balli, n. sp. 



Very similar in form to E. unicolor, but readily distinguished from 

 that species by the average smaller size and varied coloration. It is 

 also a slightly less robust species. 



General colour brownish above, much lighter below. Head moder- 

 ately full, dark brown above, face and lower part of the genre pale, the 

 upper portion of the gense generally much mottled with fuscous. Man- 

 dibles rufous distally, with piceous teeth, the overlying labrum pallid. 

 The fastigium as in unicolor. Eyes black, small, rounded, slightly longer 

 than broad. Thorax shaped as in unicolor, very dark above and pallid 

 below, the lateral lobes ample and with pale yellowish margins, broadest 

 on the posterior margin ; this pale emargination is continued narrowly 

 across the anterior edge of the pronotum above, but on the posterior edge 

 it gives way above, and towards the upper part of the lateral lobes to a 

 narrow piceous emargination. Abdomen dark above, but usually dis- 

 tinctly lighter than the pronotum and pallid beneath. Legs light brown, 

 paler beneath, the posterior femora black at apex, armed beneath on 

 inner side with from 1-3 short spines, usually r ; fore and middle femora 

 with a small genicular spine, often very indistinct or absent on the 

 anterior ones. All the tibiae spined both above and below, the spines 

 concolorous with the tibiae, and usually, especially those on the upper 

 side of the posterior pair, apically infuscated. Wings invisible in the 

 female, in the males the tympanum is visible, a fourth as long as the pro- 

 notum, very dark brown, with veins and margins pallid. Ovipositor 

 gently arcuate, castaneous, apically infuscated. 



Length of body : male 19-24 mm., female 20-25 mm - > pronotum, 

 male 5.5 mm., female 6-6.5 mm - j nm d femora, male 15.5-17 mm., 

 female 18.5-2 1 mm.; ovipositor, 13-15 mm. 



Six males, three females, Ft. Collins, Colorado. (Type No. 6150, U. 

 S. Nat. Mus.) 



These specimens were collected on August 10th, 1901, on a stony 

 hill a mile or so west of Ft. Collins. They were very active in eluding 

 pursuit, and their colour harmonized so well with the surrounding grass 

 and stones that they were with difficulty captured. They mature early in 

 August and seem to be quite local in their distribution. I was guided to 

 their haunts by Mr. E. 1). Ball, to whom I take pleasure in dedicating the 

 species. 



