1973] 
Wheeler & Wheeler — Ant Larvae 
79 
Genus Cryptocerus Fabricius 
Cryptocerus rohweri Wheeler 
Creighton and Nutting 1965: 63 — “Worker brood developed 
from egg to adult in about three months (egg to larva ± 27 days; 
larva to pupa ± 33 days; pupa to adult ± 23 days).” Eggs de- 
veloped in about a month into male larvae, which overwintered. 
Cryptocerus ( Cyathomyrmex) pallens Klug 
immature larva. Length (through spiracles) about 3.4 mm. 
Similar to C. minutus (called Paracryptocerus rninutus in 1954: 
155) except as follows. Head very large and covering approximately 
half of the anterior end. Integument of venter of anterior somites and 
all surfaces of posterior somites with a few minute spinules in short 
transverse rows. Body hairs: (1) 0.006-0.038 mm long, most nu- 
merous on the prothorax; (2) about 0.225 mm long. Head hairs very 
numerous, slightly longer (0.013-0.05 mm long). Anterior surface 
of labrum with eight hairs and/or sensilla. Mandibles moderately to 
feebly sclerotized. An isolated sensillum between each palp and the 
opening of the sericteries. 
very young larva. Length (through spiracles) about 1.6 mm. 
Body subellipsoidal, head on the anterior end (i.e., similar to 1.9 mm 
larva of C. minutus, 1954: 155). Otherwise similar to mature larva 
except in the following details. Entire integument spinulose, the 
spinules minute and in short transverse rows. Head hairs shorter 
(0.013-0.038 mm long). Labrum with ten hairs on the anterior 
surface. Mandibles sickle-shaped, no blade. 
Material studied: five larvae from Brazil, courtesy of Dr. K. 
Lenko. 
Genus Procryptocerus Emery 
revision. Profile cataulaciform. Body hairs moderately numer- 
ous. Of three types: (1) simple with flexuous tip; (2) tip short- 
branched, multifid; (3) anchor-tipped. Head hairs of two types: (1) 
simple, with long flexuous tip; (2) with short-branched (multifid) 
tip. Mandibles cryptoceriform. Posterior surface of labrum with or 
without spinules. Maxillae adnate and rounded. Hypopharynx with 
or without spinules. 
Procryptocerus adlerzi (Mayr) 
(Fig. 4) 
Length (through spiracles) about 4.6 mm. Profile cataulaciform 
(i.e., straight, elongate-subelliptical ; segmentation indistinct; head 
applied to the ventral surface near the anterior end) ; no neck. Anus 
ventral, with a posterior lip. Leg, wing and gonopod vestiges present. 
