450 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
ter, which is finely and densely punctate. Legs foveolately punctate. 
Each puncture bearing a glistening scale-like hair. 
Color black, with the marginate portions of the head and gaster 
yellow, and the tibiae ferruginous. 
Described from four workers from Abund& and Madeira-Mamoré 
Camp 41. 
The very long, slender, and curved spines of the petiole, compared 
with those of the postpetiole, and the lamellate occipital corners, with 
the concave apices are characteristic of this species. It is related to 
C. spinosus but differs in the form of the spines, and the absence of 
pile on the dorsum. 
126. Cryptocerus (Cryptocerus) spinosus Mayr. 
One colony found at Porto Velho, Rio Madeira. 
127. Cryptocerus (Cryptocerus) pusillus Klug. 
Widely distributed throughout Brazil. Numerous specimens were 
taken at Ceara, running along the wires of a fence, in the posts of which 
they were nesting. At Manaos a colony was taken from a hollow 
twig. 
128. Cryptocerus (Cryptocerus) minutus (Fabricius). 
Nesting in twigs at Natal, Manaos, Itacoatiara, and Porto Velho. 
129. Cryptocerus (Cryptocerus) depressus Klug. 
This was the commonest species of the genus at Manaos. 
130. Cryptocerus (Cryptocerus) maculatus F. Smith. 
A few specimens were taken at Natal, and a colony was found in a 
hollow twig on a caji tree at Abunda, Bolivia. 
131. Cryptocerus (Oryptocerus) multispinus Emery. 
A single worker from Abuna. 
132. Cryptocerus (Cryptocerus) cordatus F. Smith. 
A small colony from Porto Velho. 
