1952 ] 
Wheeler and Wheeler — Ant Larvae 
117 
Wheeler (1907) stated that the larvae and immature 
pupae of var. sulcinodoides Emery had a peculiar greenish 
yellow color and oily luster, which he had not observed in 
any of the other varieties (p. 75). The larvae and young 
pupae of var. canadensis Wheeler were pearly white (p. 
77). 
Myrmica brevispinosa Wheeler 
Similar to emeryana except in the following details: 
Simple body hairs all minute (about 0.003 mm) ; anchor- 
tipped hairs reduced to two per somite and restricted to 
abdominal somites i-vi. Head with the genal borders nearly 
straight. Posterior surface of labrum completely but 
sparsely spinulose, the spinules longer than in emeryana 
and in longer rows; each lobe with two to three isolated 
and a cluster of two or three contiguous sensilla. Anterior 
surface of labium with numerous short arcuate rows of 
minute spinules. Hypopharynx with minute spinules in 
moderately long subtransverse rows. (Material studied: 
two larvae and one semipupa from North Dakota.) 
Myrmica lobicornis fracticornis Emery 
Similar to emeryana except in the following details: 
Simple body hairs shorter (0.003-0.036 mm) ; denticulate 
hairs longer (0.045-0.32 mm) ; anchor-tipped hairs shorter 
(0.21 mm), restricted to the dorsal surface of abdominal 
somites i-vn. The cranium lacks the dorsolateral bulges. 
Posterior surface of labrum more generally spinulose; pos- 
terior surface of each lobe with four isolated and one set of 
two contiguous sensilla. (Material studied: a dozen larvae 
from North Dakota.) 
Myrmica monticola Wheeler 
(Text fig. 1, figs. 4-5) 
Similar to emeryana except in the following details : Ab- 
dominal hairs twice as numerous. Denticulate hairs 0.036- 
0.18 mm long; anchor-tipped hairs shorter (0.18 mm) and 
restricted to abdominal somites I-V. Head hairs all den- 
ticulate. Labrum narrowed dorsally; posterior surface 
sparsely spinulose, the spinules minute and in subtrans- 
verse rows. Mandibles without denticles on the proximal 
half of the mesal border. Apex of maxillae sparsely spinu- 
