58 Harry Scott Smith 
7. Space between eyes at top about equal to length of antennal joints 
2 and: 8” winited:is 3 Sse e end oo ooleice nie ee ere 8 
7. Space between eyes at top greater than the length of antennal 
jOmts 2 sande BiittmMIted) i...sctyoes cae the kevansce vee telat cel scene ee 12 
8. Abdomen entirely black, segments broadly margined with 
{ESTACCOMS. wis Taacecave Oates war nO ee ee eee mundus 
8 Abdomen “partly or lentirelys neds ote: ee ora ens citer 9 
9: ‘Abdomen Ventitely “reditit6 cas one - o ae eee eels sleet eee 10 
9: “Abdoment black? apicallyec2e ss as eae ances + eee eee ile 
10. Length 7 mm.; sides of face and front with medium-sized 
shallow punctures, widely separated, and the spaces be- 
tween them with exceedingly fine ones; metanotum finely 
SPamU ASC Mictiss ale seeks eae e Ror areca tee Lee puncticeps 
10. Length 10-11 mm.; front finely granulated........:.... tarsatus 
11. Pygidium two and one-half times as long as wide at base, sparsely 
PUNCHIREd. TMmekAy Ofna) SIMI a2) Aesleceteedenedee semirufus 
11. Pygidium twice as long as wide at base, much more closely punc- 
tuned ;.metamotiim opaque... isan o yeces «ce baie ole mundus var. 
12. Space between eyes at top equal to or greater than the 
length of antennal joints 3 and 4 united; abdomen black, 
two apical: seemenits: reds. ..n haan eee eee ae terminatus 
12. Space between eyes at top less than length of antennal 
VOMMES Ss ane! Arntted) sees ect once ee ee 13 
13. Greater part of abdomen red; abdomen depressed throughout, 
consimilis 
13. Abdomen entirely Black? c..cel acest eon. Vet k ete aoe ee Cee 14 
142 (Metanotum reticulated > isizes9. min. 5. sees oa eee acutus 
14. Metanotum finely granulated; size 12-13 mm.......punctifrons 
Tachysphex punctifrons (Fox). 
1891. Larra punctifrons Fox, Entomological News, ii, p. 194. 
1893. Tachysphex punctifrons Fox, Proceedings of the Academy of 
Natural Sciences of Philadelphia, p. 531. 
West Point, and Jim creek in Sioux county, June and July, 
both sexes. 
Tachysphex mundus Fox. 
1893. Tachysphex mundus Fox, Proceedings of the Academy of Nat- 
ural Sciences of Philadelphia, p. 531. 
West Point and Carns, June and July on Cassia and Euphorbia. 
Two of the specimens from the latter locality have the basal seg- 
ments of the abdomen reddish. 
Tachysphex acutus (Patton). 
1880. Larra acuta Patton, Proceedings of the Boston Society of Nat- 
ural History, xx, p. 390. 
380 
