Sphecoidea of Nebraska 51 
Males 19, females 4: Omaha (8), Lincoln (3), West Point 
(3), Mitchell (1), Crawford (1), Glen (3) and Harrison (2) ; 
May 16 to August 25; visits flowers of Chamaecrista fasciculata, 
Solidago rigida, Solidago canadensis, Spiraea sp. and Ceanothus 
sp. 
There is also one specimen of the variety. montanus in the col- 
lection; Warbonnet Canyon, July 21, 1901 (M. Cary); visits 
flowers of Borage sp. 
CRABRONINAE 
KEY TO THE TRIBES 
Abdomen depressed, flat beneath; second discoidal cell much longer than 
Mestre acuminate at the tipit... |... cslessnasvoccdsces Anacrabronint 
Abdomen seldom subdepressed, convex dorsally and ventrally; second 
discoidal cell shorter than the first, usually very much so, broadened and 
Beitr pee Clee cubm ttle rel pupanuverctais ate ive che ete ae cisantetols len rine oi lore ork Crabronini 
ANACRABRONINI 
Anacrabro Packard 
Anacrabro ocellatus Packard. 
1866. Anacrabro ocellatus Packard, Proc. Ent. Soc. Phil., VI, p. 68. 
1895. Anacrabro ocellatus Fox, Trans. Amer. Ent. Soc., XXII, p. 133. 
Males 41, females 20: Omaha (40), South Bend (8), Lincoln 
(1), West Point (3), South Sioux City (3), Neligh (2) and 
Carns (4) ; June 23 to August 19; visits flowers of Chamaecrista 
fasciculata, Asclepias tuberosa, Euphorbia sp. and Ceanothus 
americanus. 
CRABRONINI 
KEY TO THE GENERA 
PeNtaticiples simple, acute at/apex:< ..<sccsieccece sn deces cece Lindenius 
Mandibles truncate, bidentate or tridentate at apex ............... 2 
2. First abdominal segment petioliform or abdomen distinctly petiolate, 
Rhopalum 
Atmeamen sessile or subsessile: wax tuces «k's aie den vcadtew gob cscs 3 
3. Mesepimeron with a strong carina following the second pleural suture; 
mesepisternum strongly sculptured with some form of striation, 
Solenius 
Mesepimeron without a strong carina; mespisternum not strongly 
Senlptured; WStally. Oty “PUNCTSIS)s Wh. voces ces cua ene bs ones Crabro 
369 
