134 AMERICAN HYMENOPTERA. 



lection of the United States National Museum. I describe 

 the male from two specimens, deposited in the United States 

 National Museum collection. 



Pile of medium lenirth and texture. Malar space rather loti^. Queen 

 and worker with head and pleura dark, with dorsum of thorax yellow, 

 except for black interalar band, and with dorsutn of abdomen yellow, 

 except last two seq^>nents, these beins black. Males colored much like 

 females, but with pleura mostly pale yellow ; anal seg^nent dark, the re- 

 mainder of the dorsum of the abdomen being yellow 



Queen. Head. — Elongate. Usually entirely black, but rarely with 

 a faint admixture of yellow hairs above bases of antennae. Malar space 

 longer than its width at apex, between one-third and one-fourth as 

 long as eye. Clypeus rather coarsely, but not densely, punctate. 

 Third antennal segment much longer than fifth, the fifth longer than 

 the fourth. 



Thorax. — Dorsum : anterior part covered with yellow pile ; yellow 

 extending down onto anterior part of mesopleura to somewhat below 

 level of bases of wings ; a broad and well defined black band between 

 bases of wings ; scutellum clothed with yellow pile ; very center of 

 disc naked. Mesopleura, except upper anterior portion, clothed with 

 black pile to bases of legs. Metapleura and sides of median segment 

 entirely dark. 



Abdomen. — Dorsum : segments one to four, inclusive, covered with 

 yellow pile ; segments five and six black ; epipygium with a longitu- 

 dinal median carina on its apical portion. Venter entirely dark ; hypo- 

 pygium without a distinct median carina. 



Wi7igs. — Strongly infuscate ; about like those of fervidus queen. 



Legs. — Coxae, trochanters, femora and tibiae all clothed with black 

 pile. 



Worker. — Like queen in most respects; face usually with a very 

 slight admixture of yellow pile above bases of antennae ; yellow pile 

 on front part of mesopleura sometimes reaching down as far as half 

 way from level of bases of wings toward bases of legs ; very upper 

 ends of metapleura sometimes with a small patch of yellow pile imme- 

 diately behind base of wing ; wings, as a rule, considerably lighter 

 than those of queen. 



Male. Head. — Elongate. Face mostly dark, but with a noticeable 

 admixture of pale yellow pile about bases of antennae and on clypeus. 

 Occiput sometimes entirely dark and sometimes with a noticeable ad- 

 mixture of yellow hairs. Ventro-lateral portions mostly dark, but 

 with some pale hairs admixed. Malar space distinctly longer than its 

 width at apex, between one-third and one-fourth as long as eye. Cly- 

 peus with central and front portions of its disc naked and, for most 

 part, sparsely punctate, the remaining portions rather thinly clothed 



