108 
Psyche 
[September 
four apical and one lateral sensilla ; galea paxilliform with 
two apical sensilla. Labium with the anterior surface 
spinulose, the spinules minute and isolated or in short trans- 
verse rows ; palp a short protuberance with five apical sen- 
silla; opening of sericteries a short transverse slit (con- 
cealed in a groove). Hypopharynx sparsely spinulose, the 
spinules minute and in short subtransverse rows. ( Material 
studied: numerous larvae from Texas.) 
Forel, 1921, Fig. IB on p. 23; larva in side view (after 
Wheeler). (=1928, Vol. I, Fig. IB.) 
Wheeler, 1900: “Still another modification of the Spoils 
d’accroehages’ is seen in Pogonomyrmex barbatus, the 
young larvae of which have the longer bristles serrate on 
the apical half, so that they remind one of the hairs of cer- 
tain mammals” (p. 21). Fig. 9a, nearly mature larva; b, 
young larva; c, hair of latter (p. 20) . 
Wheeler, 1910: Fig. 42 on p. 76 repeats 1900, fig. 9; Fig. 
36 on p. 70, photograph of five larvae. “The larvae, as in 
E. imberbiculus, are fed with pieces of crushed or broken 
seeds. In my artificial nests these pieces were coated with 
saliva by the workers before being administered to the 
brood, a precaution which may insure the conversion of 
starch into sugar and facilitate its assimilation by the 
larvae” (pp. 290-291). 
Wildermuth and Davis, 1931 : The larvae are “cream 
Explanation of Plate 11 
Pogonomyrmex occidental is (Cresson) , Figs. 1-13, — 1, head in an- 
terior view, X44; 2, labrum (left half of drawing shows posterior view, 
right half, anterior view) XI 18; 3, labium in anterior view, XI 18; 4, 
right labial palp in anterior view, X340; 5, left mandible in anterior 
view, X118; 6, left mandible in medial view, X118; 7, left antenna in 
anterior view, X340; 8 and 9, two long denticulate body hairs, X95; 10, 
mature larva in side view, X10; 11, simple body hair, X95; 12, short 
denticulate body hair, X95; 13, submature larva, X10. 
Pogonomyrmex loarbatus (F. Smith) , Figs, 14-22. — 14, head in an- 
terior view, X44; 15, labrum (left half of drawing shows posterior view, 
right half, anterior view) X118; 16, left mandible in anterior view, 
XI 18; 17, left mandible in medial view, XI 18; 18, right antenna in 
lateral view, X340; 19, right antenna in anterior view, X340; 20, mature 
larva in side view, X10; 21, submature larva in side view (hairs omit- 
ted), X10; 22, two body hairs, X95. 
