110 HYMENOPTEEA. 



yellow. Scape fulvous or blackish, yellow beneath ; flagellum reddish-fulvous beneath ; 

 the third joint hardly one quarter longer than the fourth and twice the length of the 

 second, the fourth slightly longer than the fifth. Punctuation of the thorax moderately 

 strong; an oblique shining, im punctate space beneath the point of insertion of the 

 hind wings ; median segment with a moderately rounded ' slope ; furrowed down the 

 middle; the heart-shaped area shining, impunctate, furrowed. Punctuation of the 

 abdomen comparatively weak, and becoming still weaker towards the apex, but 

 moderately strong at the base. Petiole wider than long. Pygidial area elongate, 

 slightly narrower at the base than at the apex, the latter rounded ; the centre rugose, 

 and covered with pale depressed hair ; the sides coarsely punctured. Beneath, the last 

 segment is stoutly keeled laterally and clothed with long pile. The apical three-fourths 

 of the petiole, a large mark on the side of the second segment, the third segment 

 (except at the base and apex), the apex of the fourth and fifth segments, and the sixth 

 segment at the side are yellow. Legs yellow ; the coxae, trochanters, and a short line 

 on the femora, black. The pubescence is short and silvery. 



In the male the punctuation is stronger; the face below the antennae is entirely 

 yellow — there is only a small mark behind the eyes and none behind the ocelli ; the 

 base only of the flagellum is dull rufous ; the clypeus is slightly convex, the apex 

 produced into a rounded point and bordered with long white hair ; the second abdo- 

 minal segment wants the yellow mark and the band on the third' segment is much 

 narrower; the pygidial area bears large, widely separated punctures, the sides bulge 

 out slightly in the middle, and the apex is almost truncated, projecting at the corners ; 

 the ventral segments are irregularly banded with yellow ; the femora bear more black ; 

 and the coxae and trochanters are yellow beneath. 



Length 11-12 millim. 



The scutellum and metanotum may have the yellow markings greatly reduced, and 

 the two marks on the median segment may be absent, as also the marks on the side of 

 the second abdominal segment ; the petiole may be black ; and the legs vary in the 

 amount of black they bear. 



-J 5. Cerceris StrigOSa. (Tab. VII. figg. 5, $ ; 5 «, head ; 5 b, clypeus ; 5 c, pygi- 

 dium ; 5 d, hypopygium.) 



Clypeo convexo, apice truncato ; oculorum margines fere paralleli; area cordiformis strigosa ; nigra, facie, 

 linea pronoti, metanoto, abdominis segmentis marginibus apicalibus, tibiis, tarsisque flavis; alis fere 

 hyalinis, antice fulvis, stigmate fulvo. $ . 



lipng. 8 millim. 



Hal. Mexico, Ciudad in Durango 8100 feet (Forrer). 



Antennae black, the apical joint fulvous beneath ; the third joint one quarter longer 

 than the fourth. Eyes almost parallel. Ocelli hardly forming a triangle, the posterior 

 pair separated from the eyes by more than the length of the third antennal joint, and 



