1973] 
Wheeler Wheeler — Ant Larvae 
71 
rial studied: three semipupae from Texas, courtesy of Dr. A. C. 
Cole.) 
Leptothorax hispidus Cole 
worker semipupa. Length (through spiracles) about 3 mm. 
Similar to L. ambiguus (1955: 22) except as follows. No spinules 
on integument. Body hairs: (1) 0.013-0.025 mm long; (2) 0.025- 
0.068 mm long; (3) about 0.2 mm long, four each on AI-AIIL 
Head hairs 0.01 5-0.038 mm long, with tip bifid. Labrum with about 
ten hairs, about 0.025 mm long, on the anterior surface; posterior 
surface with eight sensilla. Each maxillary palp a raised cluster of 
four sensilla; each galea a very short peg with two sensilla. Each 
labial palp with five sensilla. 
young sexual larva. Length (through spiracles) about 3.2 
mm. Similar to the above larva except as follows. Body sac-like. 
Dorsal surface of posterior somites with a few minute spinules. 
Cranium transversely subelliptical. Anterior surface of labrum with 
four hairs. 
Material studied: four worker semipupae and two young sexual 
larvae from Texas, courtesy of Dr. A. C. Cole. 
Leptothorax nevadensis Wheeler 
Length (through spiracles) about 2.8 mm. Similar to L. ambiguus 
(1955: 22) except as follows. Integument with a few minute spi- 
nules on the venter of anterior somites and the dorsa of posterior 
somites. Body hairs: (2) 0.025-0.19 mm long; (3) about 0.25 mm 
long, on AI-AIV. Head hairs 0.013-0.03 mm long, generally dis- 
tributed. Each mandible with narrow blade and two medial teeth. 
Each maxilla with a ventral projection on the lateral surface; each 
palp a cluster of five sensilla. Each labial palp a cluster of five sen- 
silla. (Material studied: six larvae from Oregon, G. C. and J. 
Wheeler #8) 
Leptothorax niger fplendidiceps Urbani 
Urbani (1968: 460-464) described the larva and figured young 
and mature larvae and the head of the latter. 
Leptothorax nitens Emery 
Length (through spiracles) about 2.6 mm. Similar to L. ambiguus 
(1955: 22) except as follows. Thorax slightly more constricted and 
arched ventrally. Integument of venter of anterior somites and dorsa 
of posterior somites with a few minute spinules, isolated or in short 
rows. Body hairs: (1) 0.006-0.012 mm long; (2) 0.025-0.125 mm 
long; (3) about 0.2 mm long. Head hairs 0.013-0.05 mm long, 
