io8 Myron Harmon Szvenk 



red stain or pale marks on sternites 3 and 4, the band on tergite 2 subuni- 

 formly broad, merely sharply notched medially on anterior margin. 



c?. Length 11 mm. Agreeing with N. texana <S but larger, much more 

 coarsely punctured, the venter entirely shining black, the scape red without 

 a yellow cast in front, the band on tergite 2 much less narrowed medially, 

 as in the female. 



Type. — Xeligh, Nebraska. July (M. Cary), $. 



Allotype. — Halsey, Nebraska. July 11. 1909, on Amorpha 

 canescens (]\I. H. Swenk). j^. 



Paratypes. — Halsey, Nebraska, July 11, 1909. on Amorpha 

 canescens (^T. H. Swenk), 6 c^; do., on Asclepias syriaca, i (^: 

 do., on J'erbena stricta, i J*; do., July 20, 1912 (J. T. Zimmer), 

 I $; do.. August 9. I $; do.. August 23, i c^; Cams, Nebraska, 

 July 3, 1902, on J'erbena stricta (W. D. Pierce), i c^; do., July 

 27, 1902 (AI .H. Swenk). i J*. 



While this species is a close ally of te.x'ana it shows no inter- 

 gradation with that species, although typical te.vana occurs in 

 eastern Nebraska only about 150 miles from the easternmost 

 record of arenicola. xVpparently arenicola is a species character- 

 istic of the sandhill region of the state. One Cams male varies 

 from the others in having the propleura, a small area below 

 tubercles and the lower part of the propodeum red instead of 

 black as in the other males. 



Nomada (Micronomada) crassula Cockerell. 



1903. Xoiihuhi c>-assiila Cockerell. Proc. Acad. Xat. Sci. Phil., pp. 610- 

 II. c?. 



The only Nebraska specimen of this species is a male captured 

 at Halsey, July 11, 1909, on Amorpha canescens, by the writer, 

 which agrees with the type in the U. S. National JMuseum except 

 that it is distinctly smaller. 



Nomada (Micronomada) amorphae n. sp. 



$. Length 7 mm. Black with large trapezoidal lateral face marks ex- 

 tending nearly to vertex, spot on supraclypeal area, posterior orbital 

 lines, spot on base of mandibles, collar, tubercles except for a cuneate 

 mark on anterior edge, round spot on mesopleura, tegulae, axillae, meso- 

 scutellum, metanotum and abdominal bands, bright lemon yellow. Most 

 of clypeus, the labrum. and the mandibles except tips and the basal spot, 

 reddish. Antennae wholly red, joint 3 much exceeding 4. Mesoscutum 



108 



