12 PROCEEDINGS OF THE NATIONAL. MUSEUM vol. 70 



Black and yellow, the yellow distributed as follows: Scapes of 

 antennae, dorsal region of the prothorax, scutellum, metanotum, 

 tegulae, a streak below the tegulae, usually a spot on each side of 

 the propodeum and one at the end, sometimes the ventral half of the 

 petiole, an irregular spot or spots on the first dorsal abdominal seg- 

 ment, and parts of the legs. 



Female. — Head : Frons slightly concave, insertion of the antennae 

 slightly elevated; anterior margin of clypeus bilobed or bidentate, 

 the lobes rounded; clypeus and frons except above the antennae 

 covered with a dense golden pubescence, and also numerous upright 

 black to golden hairs; antennae slender, filiform, the segments hav- 

 ing the following relative lengths : 1/19, 2/4, 3/26, 4/22, 5/17, 6/14, 

 7/12, 8/11, 9/10, 10/10, 11/9, 12/10; scape yellow, bulb fuscous, the 

 remainder of antenna black, very minutely sericeous; mandibles 

 very dark ferruginous to fuscous, slightly hairy toward the base, 

 with longitudinal lines and furrows; frons above antennae, vertex, 

 genae and occiput not or only slightly pubescent, but with numerous 

 erect black to golden hairs, and weakly punctate. 



Thorax: Dorsal region of prothorax with a large yellow spot; 

 surface weakly punctate, covered with long, erect, black to golden 

 hairs. Mesonotum black, hairy, densely punctate, and sometimes 

 striate ; scutellum transverse, with a large yellow spot, longitudinally 

 striate, hairy; tegulae yellow; area just below tegulae yellow; rest of 

 mesopleural region black; whole pleural and sternal region hairy, 

 punctate, sometimes minutely striate. Metathorax black except the 

 metanotum, which has a linear transverse yellow spot; upper and 

 anterior part of metapleural region striate; the part just below 

 almost entirely smooth and without hairs; posterior part of meta- 

 thorax somewhat punctate and striate, not very definitely marked 

 off above from the propodeum. 



Propodeum: Hairy, punctate, and striate; black, usually with 

 three yellow spots — one on each side anterior to the spiracle, and one 

 at the end above the petiole, this spot varying greatly in size, but 

 usually covering the whole end of the segment and extending for- 

 ward on the dorsum, leaving a central black band which in front 

 widens to the full width of the dorsum. I have one specimen from 

 Chile in which the propodeum is almost entirely black, suggesting 

 the possibility of a variation similar to that occuring in caemen- 

 tarium. 



Abdomen: Petiole smooth, nonpunctate, or only faintly punc- 

 tate; minutely sericeous; black, sometimes with the ventral portion 

 yellow; main portion of abdomen ovate, pointed at apex, black 

 except the first dorsal segment, which has an irregular mark of 

 yellow, sometimes interrupted in the middle; smooth, and no more 



