MANN: THE ANTS OF BRAZIL. 451 
133. Cryptocerus (Cryptocerus) complanatus Guérin. 
Plate 4, fig. 35. 
A colony of C. complanatus, originally described from Cayenne, was 
taken from a twig at Itacoatiara. The species belongs to the group 
containing C. cordatus, C. spinosus, and C. inaequalis. 
Worker. Length 5 mm. 
The head is as broad as long, margin of occiput only slightly con- 
cave, the corners broadly angulate, without spines; front narrower 
than occiput; sides in front of eyes convex. Thorax longer than 
broad. Sides of prothorax narrowly margined, nearly straight; 
anterior corners angulate. Mesothorax with short spine at sides. 
Epinotum three times as broad as long, with a blunt spine at middle 
and a longer one at apical corners. Spines of petiole and postpetiole 
curved backward, those of the petiole the largest. Abdomen cordate, 
without dorsal impression at base. 
Body subopaque, coarsely punctate, each puncture with a short 
silvery hair. 
Color black throughout. 
Soldier. (Plate 4, fig. 35). Length 6 mm. 
The body is less hairy and more shining than in the worker. The 
transverse carina between the pro- and mesothorax is prominent at 
sides and more feeble on disc. The angles at anterior corners of 
prothorax are acute. Mesothorax with short, blunt spines at sides. 
Epinotum without spine at middle; the corners with a short, pointed 
spine. Spines of petiole and postpetiole similar to those of worker, 
but stouter. 
Color black. 
The worker agrees in outline with the Peruvian specimen figured 
by Emery (Bull. Soc. ent. Ital. 22, 1890, 22, p. 75, pl. 9, fig. 6). The 
outline of the soldier is shown in Plate 4, fig. 35. 
134. Cryptocerus (Cryptocerus) pilosus Emery var. fiebrigi Forel. 
Several workers and soldiers from Natal agree closely with the 
description and with cotypes of this variety recetved from Dr. Forel. 
This very distinct species has not been hitherto recorded from Brazil, 
but undoubtedly is widely distributed along the coast. 
