92 
Psyche 
[June-September 
Mesonotum and scutellum smooth and shining, often red- 
dish, the former as broad as long. Epinotum with short, 
rounded base and long sloping declivity. Petiolar border 
notched in the middle, its angulate corners more pronounced 
and acuminate than in the workers. Pubescence and pilosity 
similar, short on head and thorax, absent on anterior por- 
tion of pronotum and on the scutellum. Wings distinctly 
brownish, with brown veins bordered with darker brown. 
Brazil: Rio de Janeiro, type-locality (Thayer Exped. ; 
J. C. Bradley; C. 0. Loven) ; Abuna, Rio Madeira (Mann 
and Baker) ; Sao Paulo (H. von Ihering) ; Island of Sao 
Sebastiao; Raiz da Serra; Jundiahy; Bauru and Piracicaba, 
in the state of Sao Paulo (H. Luederwaldt) ; Rio Negro, 
Amazonas (Ducke) ; Rio Doce, Espiritu Santo (M. Caul- 
lery) ; Sao Leopoldo (J. W. Stahl) ; Rio Grande do Sul (C. 
Lindman) ; Blumenau; Taquara, Santa Catharina (H. von 
Ihering) . 
Uruguay ( teste Forel). 
Paraguay: Encarnacion (J. C. Bradley) ; San Bernardino 
(Fiebrig) ; Aregua (Zlircher). 
Argentina: Chaco, Corrientes and Misiones (C. Berg) ; 
Misiones (Mme. von Steiger). 
Var. satrapa var. nov. 
Worker maxima. Length 14-15 mm. ; head 4.8 mm. long, 
4.4 mm. wide ; hind tibia 5 mm. 
Very similar to the typical sericeiventris but somewhat 
smaller and with more brilliant, golden pubescence, longer 
and denser on the vertex, thorax and petiole ; hairs blackish 
at base, with yellow tips. Sides of head blackish or dark 
brown, smoother and more shining, their punctures sparser. 
Border of petiole usually produced or subdentate in the 
middle. 
Workers major, media and minor. Length 6-13 mm. 
Very similar to the corresponding phases of the typical 
