116 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 



variation is present in the niaculations. On one specimen there is a 

 pan- of faint discal lines on the scutum and on all there is a more or 

 less suppressed dusky band down the middle of the labrum. This is 

 usually reduced to a dusky spot at the base of the labrum but in one 

 specimen it forms a black median stripe the fuU length of that organ. 



On Fox's t3rpe (female) of this species the yellow on the dorsum of the 

 meso thorax is limited to small lateral spots on the scutum; the meta- 

 notum and dorsum of median segment are not maculated. The sides 

 of the thorax and median segment, however, are broadly maculated. 

 The color of the fasciae on the tcrgites is whitish like that of texana. 

 None of them inclose black spots, the first and fifth are interrupted, 

 the second and third are not notched at all posteriorly, and the 

 fourth is but slightly so. The emarginations on 2-4 are shallow and 

 widely separated. The lateral spots on the sternites are connected 

 and there is a median spot on 2-5. The sixth stemite has a pair of 

 lateral spots and all ventral maculations are yellow. 



Habitat. — Utah, California, Nevada. 



Niunber of specimens examined — Males, 1 ; females, 8. 



BEMBIX LATIFRONS, new species. 



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

 below, broad anterior orbits deflected inwardly at the vertex, lower 

 part of frons prolonged upward to unite with a spot below anterior 

 ocellus, spot on either side the central one confluent with the anterior 

 orbits, broad posterior orbits prolonged upon the vertex, prothorax 

 entirely, tegulae, lateral lines on scutmu very broad anteriorly, 

 U-shaped discal mark on scutmn consistmg of a pair of longi- 

 tudinal marks broad anteriorly but greatly narrowed posteriorly 

 where they unite with a broad transverse rectangualr mark, fascia 

 on scutellum narrowed medially, metanotum, broad curved fascai 

 on dorsmn of median segment, posterior surface, lateral angles and 

 sides of same entirely, mesopleurae and metapleurae entirely except 

 very narrow lines on sutures, median longitudmal stripe on meso- 

 sternum, very broad fasciae on tergites 1-5, first inclosing a pair of 

 closely approximated black spots (confluent with the black base) 

 and showing a shallow emargination on posterior middle, second and 

 third each inclosing a pair of narrow, widely separated elliptica 

 black spots and acutely emarginate on posterior middle, fourth and 

 fifth biemarginate on anterior border, dorsal surface of ultimate 

 tergite, broad fascia and pair of anterior spots on second sternite, 

 broad fascia inclosing a pair of small black spots on third, fascia 

 broadly emarginate on fourth, lateral spots on fifth, coxae and tro- 

 chanters in part, femora except narrow stripe on posterior surface of 

 first pair and short basal marks on anterior surface of second and third 

 pairs, tibiae except narrow line on posterior surface of first pair, and 

 tarsi, yellow. 



