22 E. T. CRESSON. 



Tenthredo parTuIa. — % . — Very small, black; spot at summit of eyes, 

 two dots above insertion of antennae, most of cheeks, clypeus, labrum, mandi- 

 bles except tips, palpi, posterior angles of prothorax, broken line and spot on 

 pleura, line above intermediate coxae, spot above posterior pair, tegulse, all 

 the legs beneath and spot on sides of basal plates, all yellowish-white; wings 

 hyaline, nervures black; abdomen ferruginous, basal plates, first segment and 

 basal margin of second, black. Length .24 inch. 



Hub. — California, (Crotch). 



Tentliredo mipera. — % . — Black; two spots above insertion of antennae, 

 dot at summit of eyes, narrow anterior orbits, lower half of cheeks, clypeus, 

 labrum, mandibles except tips, palpi, upper posterior angles of prothorax, 

 sometimes obsolete, pectus, spot or line on pleura, generally confluent with 

 spot covering the pectus, spot above posterior coxae, tegulae, all the coxae except 

 base above, trochanters, and four anterior femora except black line above, pale 

 yellow; wings slightly tinged with dusky, nervures fuscous or black ; posterior 

 femora except black line above, four posterior tibiae and tarsi, and the abdomen 

 entirely, sanguineous. Length .35 — .40 inch. 

 Ilab. — Nevada, (Morrison). 



Tenthredo rubella. — %. — Black; spot beneath eyes, clypeus, labrum, 

 mandibles except tips, palpi, line on lower part of pleura, spot on pectus, and. 

 four anterior coxae and trochanters beneath, pale yellow; posterior angles of 

 prothorax, sometimes spots or stains on thorax above and on sides, reniaindef 

 of legs, except sometimes a line on coxae and femora above, and the abdomen 

 entirely bright fulvo-ferruginous or sanguineous; wings fuliginous, with an 

 aeneous reflection, nervures and stigma black: posterior tibiae and tarsi more, 

 or less fuscous, the apical joints of the latter yellowish ; apex of abdomen 

 sometimes dusky. Length .50 inch. 



Hab. — Nevada, (Morrison). 



Tentbredo ferrngineipes. — 9- — Black, shining; dot at summit of 

 eyes, lower anterior orbits, spot on middle of face, all sometimes wanting, spot 

 beneath eyes, clypeus, labrum, mandibles except tips, palpi, posterior angles 

 of prothorax, spot above posterior coxae and tegulae, and spot on sides of basal 

 plates, sometimes wanting, all pale yellow; wings tinged with yellowish, nerv- 

 ures fuscous; legs except coxae, and trochanters above, ferruginous, anterior 

 pair more or less yellowish ; the fourth and following segments of abdomen, 

 ferruginous; sometimes the second and third segments above are varied with 

 ferruginous. Length .45 inch. 

 Ilab. — Colorado, (Morrison). 



Tentbredo sectilis. — 9- — Black, shining; clypeus, labrum, mandibles 

 except tips, palpi, tegulae, sometimes two spots above posterior coxae, and 

 anterior legs before, white; wings more or less smoky, with a slight violaceous 

 reflection, nervures black ; legs except coxae, trochanters and sometimes a line 

 on anterior pair above, fulvo-ferruginous ; abdomen with the fourth and follow- 

 ing segments more or less brown-ferruginous. Length .40 inch. 



9 var. — Tegulse black; tips of posterior tibiae and their tarsi more or less 

 fuscous or black, sometimes only the fourth abdominal segment ferruginous. 

 Hab. — Colorado, Nevada, (Morrison). 



