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Sphecoidea of Nebraska 33 
Brachystegus Costa 
KEY TO THE SPECIES 
PEN ATMEn CILEILeL ys DIACI Ma be'-she ce ecie cit due ae es ca C oeinte. bte oe ete as 2 
Prem MOTE OF TESS TEC. .8 5 essai 8 Feuele ob bales vvon cid dae uw Mele 3 
Pape Seeds SHECIES: GO-TO sc 08 4 sieeve fo vitic aoe as Vealee wie mellipes 
EU PIACH. “SDECICS As TAMA. sin fo sg so vis s bah cerws Holdin wen bibles maculipes 
ereumomen entirely red... cfs 250. ee eee cw dvd eslewce ee ne's metathoracicus 
NNMNEPRR TEE MN NCAR EE Ee ss toa Sy atin Fare bieolic ee ake MEE & Ae 4 
4. First threé abdominal segments with yellow bands; legs red; pronotum 
gee SeMteium marked with yellow. . 6.0... .¢ 0006.00 c8e0 bases bellus 
Abdominal segments without bands; with a yellow lateral spot on each 
segment; legs blacker; pronotum and scutellum entirely black. 
trichrus 
Brachystegus mellipes (Cresson). 
1882. Nysson mellipes Cresson, Trans. Amer. Ent. Soc., IX, p. 279. 
1896. Nysson mellipes Fox, Journ. New York Ent. Soc., IV, p. 15. 
Males 3, females 2: Omaha (2), Lincoln (1) and Glen (2); 
July 14 to August 21; visits flowers of Chamaecrista fasciculata. 
Brachystegus maculipes Mickel. 
1916. Brachystegus maculipes Mickel, Trans. Amer. Ent. Soc., XLII, 
p. 400. 
Females 4: Omaha (4); June 15 and 26. 
Brachystegus metathoracicus H. S. Smith. 
1908. Brachystegus metathoracicus H.S. Smith, Univ. Nesr. STupies, 
VIII, p. 338. 
Females 2: Glen (2) ; August 20 and 21. 
Brachystegus bellus (Cresson). 
1882. Nysson bellus Cresson, Trans. Amer. Ent. Soc., 1X, p. 280. 
1896. Nysson bellus Fox, Journ. New York Ent. Soc., IV, p. 16. 
Females 2: Glen, August 20, 1906 (H. S. Smith); Mitchell, 
July 28, 1917 (C. E. Mickel). 
Brachystegus trichrus Mickel. 
1916. Brachystegus trichrus Mickel, Trans. Amer. Ent. Soc., XLII, 
p. 400. 
Females 2: Omaha (2); July 5, 1913 (L. T. Williams), and 
August 18, 1914 (L. T. Williams). 
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