100 E. T. CRESSON. 



and acute; sometimes the base of second segment is ferruirinous ; 

 venter black, sometimes varied with ferruginous, a yellow b;ind on 

 posterior margin of second segment deeply indented laterally, three 

 following segments with a lateral yellow line or spot, l^ength 10 — 12 

 lines. 



Three specimens. Nevada. The prevailing color ( f tlie dors.il 

 segments of the abdomen is pale yellow, the band occvi|)ying nearly the 

 entire width of the segment, leaving only a narrow black margin at 

 base and apex; the basal margin of the yellow on tirst segment is 

 more or less sinuous. 



Vcspa oc'oi<leiitaIis, n. sp. 



9. — IJlack ; clypeus, mandibles except tips, large triangular mark 

 on front, anterior orbits filling the sinus, broad posterior orbits, scape 

 in front, large elongated mark on each side of prothorax in front of 

 teguhc, a triangular spot beneath wings, two large transverse spots on 

 scutellum, band on postscutelluiu interrupted medially, sometimes two 

 spots on metathorax, and generally two small spots on mesothorax 

 posteriorly, lemon yellow; clypeus rather broader than long, with a 

 black dot on middle, the apex broadly and rather deeply emarginated, 

 the lateral angles prominent; eyes and base of mandibles contiguous; 

 tegulae yellow, pupilled with black or brown ; wings pale fuscous, legs 

 lemon-yellow, base of femora more or less black ; abdomen lemon- 

 yellow, first segment with a black spot on each side anteriorly, not 

 enclosed, and a large triangular one on the middle ; base of second 

 and the three following segments more or less broadly black, deeply 

 indenting the yellow medially, and with a black spot on each side of 

 the middle; apical segment black with a large triangular black spot 

 on each side; venter yellow, with a transverse black spot on each side, 

 second segment broadly black at base, confluent with the lateral black 

 «pot. the yellow band occupying the apical half of this segment divided 

 by a black medium stripe. Jjength 8^ lines. 



% . — Kesembles the ? in markings, except that the apical yellow 

 bands on second and three following segments are niuch narrower and 

 acutely indented medially and scjuarely on each side of the middle, the 

 black spots not enclosed. Length (J lines. 



Three 9 % specimens. Collected in Nevada by Dr. H. C. Yarrow, 

 and in New Mexico by 3Ir. Henshaw. Distinguished at once from 

 (jermanica by the scape of antennjx; being yellow beneath and by the 

 different ornanjctitation of the first abdominal segment. 



