no. 2173. A REVISION OF THE BEMBICINE WASPS— PARKER. 43 



pair, tibiae, and tarsi except tips of middle and posterior pairs, yellow 

 or yellowish white. 



On the abdomen the markings are almost white, the color approxi- 

 mating Bidgway's marguerite yellow. On the thorax and median 

 segment above and on the head the yellowish tinge is somewhat more 

 apparent; it is still more conspicuous on the scape and sides of thorax 

 and median segment, and the legs, except the coxae, are decidedly 

 yellow. The under side of the flagellum is yellowish, changing to tes- 

 taceous toward the apex. The ultimate segments of the tarsi are but 

 slightly dilated, and that of the middle tarsi and all the segments of 

 the posterior pair except the metatarsi are decidedly dusky above. 



Length. — 18-20 mm. 



The wings in both sexes are hyaline and the nervures brown. The 

 narrowing of the second cubital cell on the radial vein is less pro- 

 nounced in the female than in the male. The pubescence is rela- 

 tively short, moderately dense and white except on the vertex, where 

 it assumes a brownish color. The head is somewhat narrower than 

 the thorax, more evident in the male than in the female, and the inner 

 margins of the eyes are approximately parallel. On the type (a 

 female) there are fasciae on sternites 2-4 ; on the female from Kansas 

 the lateral spots on sternites 1, 2, and 6 are united on the midline. 

 The fasciae on the tergites of the male are narrower than those of the 

 female, and the first is interrupted medially, but in design they are 

 quite similar. 



In the discussion of formosa it is pointed out that that species has 

 been regarded as identical with this, but it is very easy to separate 

 the males on structural differences, and, although the females lack 

 these structural characters, their markings are just as distinctly dif- 

 ferent as are the structures on the males. On formosa all tergites 

 except the last possess a black apical border; this black border is 

 entirely wanting on speciosa. The apical tarsal segments of formosa 

 are yellow; the middle and posterior pairs of speciosa are dusky, 

 almost black. The fasciae on the tergites of formosa are yellow; on 

 speciosa they are almost white. 



Habitat. — Colorado, New Mexico, Kansas. 



Number of specimens examined: Males, 2; females, 4. 



STICTIELLA MELAMPOUS, new species. 



Figs. 65, 66, 108. 

 IMonedula speciosa Patton, Bull. U. S. Geol. Surv., vol. 5, 1879, p. 361. 



Male. — Black: Labrum, mandibles except apices, clypeus, scape, 

 and first two segments of the flagellum below, lower part of f rons pro- 

 duced upward between antennae, curved spot in front of anterior 

 ocellus, broad anterior orbits, narrow posterior orbits, prothorax 



