126 AMERICAN HYMENOPTERA. 



Wind's. — Strongly infuscate, but much lighter than those of queen 

 and considerably lighter than those of most workers ; with practically 

 no violaceous reflections. 



Legs. — Mostly dark; the trochanters and coxae and the very lowest 

 portions of the meso- and metapleura with a strong sprinkling of dirty 

 whitish hairs. Hind tibite with outer faces convex and hairy through- 

 out, with no long fringes and no trace of corbiculse. Hind metatarsi 

 with outer faces distinctly concaved and with no long fringes. 



Dinieyisions . — Length : queen, 20 mm. to 21 mm. ; worker, 10 mm. 

 to 17 mm. ; male, nearly 14 mm. Spread of wings : queen, 42 mm. 

 to 47 mm. ; worker, 28 mm. to 37 mm. ; male, 33 mm. to 34 mm. 



The species is here described from six queens, numerous 

 workers and two males. The typical species, above de- 

 scribed, grades completely into the following forms, speci- 

 mens of which are before me : 



Color VariaJtt i — Worker like typical form, but with scutellum and 

 front part of dorsum of thorax bearing only a little yellow pile, this 

 being thoroughly mixed with black hairs. About 12 mm. long. A 

 single worker from Chiriqui. 



Color Variant 2 — Queen like typical form, but with scutellum entirely 

 black ; with only a little yellow pile on the front part of the dorsum of 

 the thorax, this having a slight admixture of black hairs. About 18 

 mm. in length. A single specimen from Brazil (Sao Paulo). 



Color Variant 3. — Worker like typical form, but with thorax entirely 

 black — thus completely paralleling w^,rzVa//«j in coloration. About 12 

 mm. in length. A single specimen from Chiriqui. 



Color Variant 4. — Like Color Variants, but with yellow pileon third 

 dorsal abdominal segment confined to posterior portion of that segment 

 and not reaching its side margins. About 15 mm. in length. A single 

 worker from Paraguay (Sapucay). 



Color Variant 5. — Worker like typical worker, but with abdomen 

 entirely black. Length about 12 mm. A single specimen from Para- 

 guay (Sapucay). 



Male Color Variant i. — Like typical male, but with interalar band 

 slightly more than half as wide, from front margin to rear margin, as 

 long, from wing base to wing base, and with second, third and fourth 

 dorsal abdominal segments entirely covered with yellow pile and with 

 epipygium clothed with entirely ferruginous pile. Hind femora with 

 scattering of yellow hairs on lower side of middle portion. Ventro- 

 lateral portions of head bearing a mixture of dark and yellow hairs. 

 Length about 19 mm. A single specimen from Boquete, Chiriqui 

 (3,500 feet altitude). 



Male Color Variant 2. — Like typical male, but with ventro-lateral 

 portions of head entirely dark and with yellow pile on front part of 



