HENRY J. FRANKLIN. 395 



Types. — The queen is in the collection of the British Mu- 

 seum. The males (described by Cresson as Apathusf cali- 

 fornicus) are in the collection of the American Entomologi- 

 cal Society. Both the queen and the male type specimens 

 were from California. 



Head black ; anterior part of dorsum of thorax covered with yellow 

 pile ; wings deeply stained with brown ; two apical abdominal segments 

 black ; color characters of thorax, abdomen and legs very variable — see 

 below under ' ' Variation ' ' 



Queen. Head. — Sometimes with a slight trace of light pile mixed 

 with the black on the face, above the bases of the antennae, otherwise 

 with dark pile only. Labrum much as in B. affinis, but with borders of 

 tubercle-like areas rounded and much less sharply elevated ; translucent 

 areas sometimes large enough to be plainly visible to the naked eye, 

 sometimes nearly absent. Malar space about one-third as long as the 

 eye. Clypeus rather evenly, sparsely and finely punctate. Third an- 

 tennal segment much longer than fifth, fifth distinctly, but not greatly, 

 longer than fourth. 



Thorax. — Anterior part of dorsum covered with yellow pile back to 

 the middle of the tegulse ; posterior part, including scutellum, covered 

 with black pile. Pleura, from somewhat below the level of the bases 

 of the wings in front, entirely covered with black pile; sides of median 

 segment bearing only black pile. 



Abdomen. — Dorsum, except fourth segment, bearing only black pile ; 

 fourth segment entirely covered with yellow pile. Venter sparsely 

 clothed with black hair. 



Wings. — Deeply stained with brown ; fore wings darkest at median 

 and submedian cells and on anterior and apical portions of the radial 

 cell and on the general apical region beyond the veins. 



Legs. — CoxEe black ; trochanters usually black, but often with pile 

 having a distinctly light tinge ; femora black ; fore and middle tibiae 

 and corbicular fringes black ; hind metatarsi, for most part, bearing 

 only pubescence and short spines, with a slight fringing of short hairs 

 on the posterior border near the base. 



Worker. — Much like queen except in size ; wings usually somewhat 

 lighter. 



Male. Head. — Face above and below bases of antennae bearing 

 yellow and black pile mixed in varying proportions, the black being 

 always present in very noticeable amount and often predominant ; 

 occiput with a prominent triangular patch of yellow pile, with or with- 

 out black hair intermixed ; sides of head behind eyes with more or 

 less yellow pile ; hair immediately surrounding the upper ends of the 

 eyes black. Malar space between one-third and one-fourth as long as 

 the eye ; clypeus not covered up with pile, rather sparsely and finely 



TRANS. AM. ENT. SOC. , XXXVIII. 



