March igoo.] /'S YCHE. 35 



c'. Prozone of the pronotum strongly elevated and bilobate. Disk of 

 the wings faintlv tinged with blue. Fuscous band narrow and indistinct. 



CaenilelpcJiuis Brrin. 

 c'-. Prozone of the pronotum very little elevated and scarcely bilobate. 

 Disk of the wings deep blue. Fuscous lumd broad and distinct. 



Cyancifciniis Brun. 

 b -. Fuscous band wanting. The wing entirely hyaline. Posterior tibiae 

 obscure greenish or brown. Posterior femora with the disk of the inner 

 face black with tv/o light bands on the apical half. Lower sulcus light with 

 one preapical black band. ..... Azurescens groi'p. 



c '. Scutellum of the vertex broad, scarcely longer than broad and about 

 equal in width to the diameter of the eye as seen from above. Process of 

 the metazone acute ...... Azurescens Brun. 



c '". Scutellum ot the vertex narrow, plainlv longer than broad and much 



less than equal in width to the diameter <if the eye as seen from above. 



(/'. Process of the metazone rounded. Basal fuscous band distinct 



fiom the fuscous points ot the immediate base. Larger, male more 



than 20 mm. long ..... Psciitfofasciato Sciuld. 



d'-. Process of the nutazone sharp. Basal fuscous banil of the tegmina 

 not distinct from the spots of the immediate base. Smaller, male less 

 than 30 mm. long ....... Lanta Scudd. 



Of the fiftv-fonr species enumerated in northwest Arkansas and southern 



in tlie preceding kev twent\-four are Illinois. Five species are not found 



new. Sixteen species are conhned to \\ ithin the limits of the United States. 



California as follows: /tyah'na, rebel/is. These are tolfcca, ochraceipomis, pal- 



alboliiieata^ pori'ccta, coqii/lletti, cal- liJipeiiiiis^ laiita and collaris. The 



iginosa. albescens, koebe/ei, i/ialassica, remaining species, twenty-seven, belong 



ca/ifori//ca, pac/Jica, p/'losa, fallax, to Rocky Mountain States. jMoiiticola 



coiispersa. i-aric^'afa . and pseudofcrs- extends from Colorado into Mexico 



c/ir/ir. 'J^hree others arc confined to and pistriiiaria from Texas into Mex- 



the Pacific coast within the L'nited ico. Ciiicta ranges from California to 



States : caen/lripes, bifasciata aiul Texas. TcxcDia ranges from Texas to 



siinilis. Three aie fomid east of the New Mexico ; cn'stata from Lower 



Mississi|)pi : maritima. saxatilis and California to Salt Lake \"alley. Utah ; 



citriiia. The last mentioned extends lalifasciata froni ITtah to Washington ; 



fiom the Rock\' JMountains to Mary- cacridci pciiiiis from California to W'y- 



laud. The first mentioned is restricted oming. TInee species, saliiia^ agres- 



to the Atlantic coast and the shores of //.v. /irict-c/i^/cc are couHued to Nebraska ; 



the Great Lakes and saxatilis is lonnd tliree also, iiiibila, iitodesla .and i/tcliin- 



