347 
1986] 
Wheeler & Wheeler — Larvae of Eciton 
Figure 2. Eciton hamatum. HI, first instar larva; HII, second instar larva; Hill, 
third instar larva; HIV, fourth instar larva; HV, head of fifth instar (= mature) larva. 
Side views, X 38; heads in anterior view, X 50. He, larva inside egg with mouth parts 
breaking shell, X 38. 
12. Maxillary palp represented by a cluster of 10 sensilla. Otherwise 
similar to first instar larva. 
Third Instar Larva. Length (through spiracles) 2. 5-3. 5 mm. 
Widest at AVII. Spiracles about 0.01 mm in diameter. Body hairs 
0.013-0.037 mm long, most on thorax and AI and a few of A VI- AX. 
Cranium slightly broader than long. Head hairs 0.013-0.037 mm 
long, about 50. Labrum feebly bilobed. Mandible with apical half 
more narrowly tapered to a sharp point, apex straight. Maxillary 
