March 1S98.] 



rSl CHE. 



187 



about eight black dots, medially and laterally 

 with indistinct pairs of longitudinal lines; 

 base of terminal segment black. Venter 

 except edges of pygofers, very dark. Fore 

 and middle femora obscurely annulate with 

 brown . 



Last ventral segment a little longer than 

 preceding, hind margin .slightly roundly 

 produced at center, laterally sloping. Ovi- 

 positor extending one fifth of its length be- 

 yond the pygofers. Pygofers with a few 

 white hairs at extremity. 



In macropterous females the elytra do not 

 diflfer from those of niagdalena, except that 

 toward the apex the white veins are distinctly 

 narrowly bordered with brown. 



Described from ten females collected 

 by myself at Fort Collins, Colo., and 

 in the adjoining foothills, from April 

 23d to July iS. 



Athysanella acuticauda n. sp. Brachypter- 

 ous female. Length 3.5 mm. Resembles 

 occidetiidlis in coloration, but is stouter. 

 Front about as broad as long, once and three 

 fifths the length of the clypeus. Clypeus 

 one fourth longer than broad. Vertex very 

 obtusely angulate, slightly depressed posteri- 

 orly, length at middle three fourths of width 

 between the eyes. Pronotal width twice and 

 three fourths the length, the latter four fifths 

 that of the vertex. 



Color as in occiden/alis, except that on the 

 pronotum there are but two median spots. 

 Venter darkened at base, a broad median 

 portion of last ventral segment and a longi- 

 tudinal line on each pygofer, black. 



Last ventral segment a half longer than 

 preceding, hind margin truncate or slightly 

 sinuate, the lateral angles slightly roundly 

 projecting; the ovipositor extending one 

 sixth of its length beyond the pygofers. 



Macropterous female. Elytra deep fuligi- 

 nous, the veins yellowish, sharply contrasted. 



Brachypterous male. Valve as in magda- 



leiia, plates very short, subtriangular, bent 

 outward and widely diverging. 



Described from nine females and 

 one male. The single male was col - 

 lected at Algonquin, 111., Aug. ist. 

 (Dr. W. A. Nason). The females 

 are distributed as follows : Algonquin, 

 111., July 20th (Nason) ; Toronto, 

 Canada, (R. J. Crew and C. T. Hills) ; 

 and at the following localities in North- 

 ern Colorado, collected by myself: 

 Foothills near Fort Collins, June 20th 

 to Aug. 4th and at various points in the 

 mountains up to iiSoo feet altitude at 

 Cameron Pass. 



At/iysnuella robusta n. sp. Brachyptei'- 

 ous female. Length 4 mm. Form nearly of 

 acuticauda. Front very little longer than 

 broad, once and four fifths the length of the 

 clypeus. Clypeus one sixth longer than 

 broad. Vertex broadly tumidly rounded in 

 front, slightly depressed posteriorly, length 

 at middle two thirds of the width between 

 the eyes. Pronotal width twice and four 

 fifths the length, the latter little less than 

 that of the vertex. 



Color pale fulvous; markings as in acuti- 

 cauda^ except that the vertex has only a 

 small comma shaped brown dot on either 

 side half way between eye and apex, the 

 large bl.ick spots being absent. Elytra cin- 

 ereous, with five brown dots along apical 

 border. 



Last ventral segment of the same length 

 as preceeding, broadly emarginate with a 

 large rounded sliining black tooth nearly 

 filling the emargination and equalling the 

 lateral angles. Ovipositor exceeding the 

 pygofers by little less than one fifth of its 

 length. 



Brachypterous male. Valve black, nar- 

 rowly edged with yellowish, plates short, 



