70 Psyche [Sept.-Dee. 
IV. var. atrox. Length 4-4.7 mm.; head almost as 
broad as long. 
V. var. inf emails. Differs from the type by lack of 
margination, from convarians by larger size, 
from gaigei by the narrow postpetiole and from 
atrox by the nonenotched clypeal lobe. 
VI. var. scelerosa. Very near to infernalis but with 
the mesonotal disc more elevated (low in in- 
fernalis). 
Larger forms. PL II, fig. 7 group elegans 
A. auripes. Length 8 mm.; color blackish brown with 
yellow legs, contrasting sharply. 
B. distinct a var. pulchella (see also under spinicola). 
Head and abdomen black, thorax and pedicel ferru- 
ginous red; length 8 mm. 
C. elegans type. Head and abdomen black, thorax and 
pedicel ferruginous red. Length three lines (about 
8 mm.), and the variety breviceps. Head shorter 
than in the type ; petiole narrower with less margina- 
tion; petiole and thorax deep red with brown spots. 
(The differences given in Forel’s description warrant 
raising the variety to the rank of a species. We have 
not seen the type of the variety.) 
Branch Apedunculata 
1. Petiole in profile less than twice as long as high. PL III, 
fig. 10 2 
Petiole in profile more than twice as long as high. PL III, 
fig. 18. 
2. Very slender forms with long and narrow head: 
A. subtillissima type. Length 3-3.5 mm.; color testa- 
ceous. Costa Rica. (The variety tenuissima has been 
raised to species rank and listed under Ornatinoda.) 
B. voytowskii. Length 2.2 mm.; occiput transparent; 
prothorax yellow, rest of the body brown, Peru, and 
the variety costariensis. Length 4.2 mm.; head red- 
dish brown; opaque (shiny in the type). Costa Rica. 
More robust forms 3 
3. Petiole with backwardly directed antero-ventral tooth. PL 
III, fig. 10. 
A. wessoni. Length 3.5-4 mm.; uniformly yellow; pedi- 
