Sphecoidea of Nebraska 97 
Interocular space at vertex about equal to the length of antennal 
EMERES Bee AIP ICG Cn eran wn tet erates shore Seo wk Oh OTA Bio ee 13 
11. Tibiae and tarsj reddish; front and thorax of body with rather long 
LADIES Ml CRNA 29 Ee aR eee ty AIS A De me Sega Airy Se minor 
Legs entirely black, except apical portion of tarsi may be reddish.. 12 
12. Silvery fasciae of abdomen distinct; body well covered with pile; 
thorax scarcely shining, with larger, closer punctures...... obscurus 
Silvery fasciae of abdomen not very well defined; insect sparsely 
pilose; thorax shining, the punctures there finer and more separate, 
intermedius 
13. Longer spur of hind tibiae shorter than the basitarsus; tarsi entirely 
TPEANAME Pe hove pte Gita ae eerie d spare ei aioe Acre Wisiatcaete teas see parvus 
Longer spur of hind tibiae longer than the basitarsus; tarsi with the 
PATE hE LOM UTSM be racine sw cision tae meas a eae ale oc eR minutus 
Tachytes mandibularis Patton. 
1880. Tachytes mandibularis Patton, Proc. Bost. Soc. Nat. Hist., XX, 
18093. ae mandibularis Fox, Proc. Acad. Nat. Sc. Phil., p. 5ot. 
1913. Tachytes mandibularis Williams, Kans. Univ. Sc. Bull., VIII, 
p. 152. 
Males 32, females 25: Weeping Water (1), Louisville (4), 
Meadow (5), Ashland (1), Lincoln (8), Malcolm (2), Curtis 
(1), Halsey (1), Mitchell (21), Glen (9) and Bad Lands (4) ; 
July 16 to August 20; visits flowers of Solidago glaberrima, Sym- 
phoricarpos symphoricarpos, Lactuca pulchella, Asclepias sp., 
Petalostemum violaceus, Melilotus alba and Cleome serrulata. 
Tachytes harpax Patton. 
1880. Tachytes harpax Patton, Proc. Bost. Soc. Nat. Hist., XX, p. 
394. 
1893. Tachytes harpax Fox, Proc. Acad. Nat. Sc. Phil., p. 501. 
Males 9, females 3: Omaha (6), Lincoln (1), West Point (2) 
and South Sioux City (3) ; July 8 to August 20; visits flowers of 
Solidago rupestris and Chamaecrista fasciculata. 
Tachytes calcaratus Fox. 
1892. Tachytes calcaratus Fox, Trans. Amer. Ent. Soc., XIX, p. 239. 
1893. Tachytes calcaratus Fox, Proc. Acad. Nat. Sc. Phil., p. 501. 
Males 3: Omaha (1), Louisville (1) and Lincoln (1); July 
30 to September 4; visits flowers of Solidago glaberrima. 
415 
