1971] 
Haskins & Zahl — Dinoponera 
7 
2/8/71 
2/1 Q/71 
2/11/71 
2/16/71 
2/17/71 
2/21/71 
2/22/71 
2/25/71 
3/6/71 
3/14/71 
3/19/71 
4/13/71- 
4/14/71 
One cocoon destroyed by nurses. Pupa not recovered. (Two 
(Two cocoons; 3 large larvae.) 
Fourth larva banked for spinning. 
Fourth cocoon spun (3 cocoons; 2 large larvae). 
Fifth larva banked for spinning. 
Fifth cocoon spun (4 cocoons; 1 large larva; no eggs). 
Sixth larva banked for spinning. 
Sixth cocoon spun (5 cocoons; 1 egg). 
Second cocoon rejected from nest. Opened, disclosing normal, 
apparently healthy worker pupa, entirely unpigmented. (Four 
cocoons, eggs.) 
Third cocoon rejected from nest. Opened, disclosing perfect, ap- 
parently vital worker pupa, with eyes fully pigmented. 
Fourth cocoon rejected from nest. Opened, disclosing perfect, 
apparently vital worker pupa, eyes fully pigmented, and body 
pigmentation well advanced. 
Fifth cocoon rejected from nest. Opened, disclosing perfect 
worker, with eyes fully pigmented, and body pigmentation 
well advanced. 
Sixth cocoon hatched, eclosing perfect worker of adult pigmen- 
tation. 
workers are large and robust (approximately 23.0 mm X 8.5 mm) 
and formed of a tough, dark brown silk. In eclosions of the imago 
that we have witnessed, attendant workers have assisted in opening 
the cocoon at the anterior pole, but it is possible that isolated pupae 
can emerge unassisted, as in some other Ponerinae. In the artificial 
nest, young workers have been almost fully pigmented at eclosion. 
It is likely that this is also the case under natural conditions, a situa- 
tion typical of some other members of the Tribe Ponerini. 
The two fragments of the collected colony were kept separate 
throughout the observations, and separate records of brood rearing 
were maintained. That for Group A is indicated in Table I. 
Thus from brood of this group, originally comprising 10 wild- 
collected “workers,” 15 cocoons of worker size and form were 
matured. The contents of 1 1 were definitely identified as worker 
pupae or adults. In the remaining 4 the cocoons were workerlike 
in form, but the contents could not be verified because of their 
early death or premature examination. The developmental periods 
recorded for 8 larvae followed from hatching to cocoon spinning 
were 24, 25, 27, 29, 31, 43, 44, and 44 days. The interval between 
the covering of a spinning larva with soil and the cleaning of the 
completed cocoon was 1 day for each of 6 individuals. The interval 
between the completion of the cocoon and the appearance of the 
meconial spot in 4 individuals was 4, 3, 4, and 5 days. Periods 
