PAL Mr. T. D. A. Cockerell on 
thorax ; clypeus black or dark reddish ; lower corners of face 
often reddish ; lower part of prothorax, a variable amount of 
pleura, and metathorax except enclosure red; abdomen with 
a variable amount of red, always including the base of first 
segment dorsally and basal half of venter; punctures of 
mesothorax well separated on a shining ground; ventral 
surface of abdomen with two light bands, on segments 3 and 
4; cream-coloured marks on hind coxe and hind tibie at 
apex, and sometimes at base. Also similar to N. Hezlig- 
brodtiz, Cresson, but smaller and differing in various details. 
3 -—Length 7 millim. Similar to the female, but some 
yellowish white on scape beneath and at apex of hind femora ; 
face up to level of antenne, and higher at sides, yellowish 
white; apical plate deeply notched. 
flab. Juarez, Mexico, May 12, 1 & (Cockerell): Las 
Cruces, New Mexico, 2 ¢, May 10, 11; 1 g, May 11 
(Zownsend): Mesilla, N. M., July 25, 1897, at flowers of 
Aster spinosus, 1 } (Cockerell): Mesilla Park, N. M., May 7, 
at flowers of Dithyrea Wislizenti, 1 9, 2 63; May, 1 6 
(Townsend) ; May 9, on foliage of poplar, 1 ¢ (Cockerell). 
Named after Mr. H. L. Viereck, in recognition of his work 
on New Mexico bees. 
Nomada crucis, sp. n. (vel tewana, subsp. ?). 
¢.—Length 7 millim. 
Black, with bright yellow markings and red legs; quite 
like N. Viereck, except in the colour of the markings, the 
coarsely, densely, and confluently sculptured mesothorax, 
the longer antenne, and the strongly testaceous hind margins 
of abdominal segments 2 to 5. The only red about the 
thorax is on the hind part of the metathorax. Apical plate 
of abdomen deeply emarginate. Also formerly confused with 
N. modesta, but is smaller and without the metathoracic 
spots. 
Nab: Las Cruces, New Mexico, August 11 &e., 4 ¢ 
(Townsend); Deming, N. M., at flowers of Verbesina enceli- 
otdes, July 9 (Cockerell). 
This may possibly be a variety of N. neomexicana, but it 
is smaller and more compact, with a shorter abdomen, the 
ventral surface of which has two pale bands. By the latter 
character it agrees with NV. tevana, to which it is extremely 
similar; but although the insect is smaller, the mesothoracic 
punctures are larger (from middle line to margin near tegula 
11 or 12 in crucis, 14 or 15 in texana), and not so close on 
the disk. In MN. crucis the transverso-medial nervure joins 
