12 
16. Antennal sockets some distance from posterior mar- 
gin of clypeus (Fig. 14B) ; clypeus somewhat 
rectangular, with part of its lateral margins 
nearly parallel ........--..- 15. Camponotus 
Antennal sockets close to or touching posterior mar- 
gin of clypeus (Fig. 14C and D) ; clypeus almost 
diamond shaped, its lateral margins very oblique 
deh 
Fe Aa ACA ae luc B, > CaN CRE CATECL Dig FOUEY OTS UPI IO OM: od oT IS A O90) 
17. Node of petiole low and sloping anteriorly, the 
whole petiole forming a low triangle (Fig. 9F 
and G) oo... 200. (06 4 a le 
Node of petiole upright, the entire petiole forming 
a high triangle (Fig. 9C and F) ........... is 
18. Scapes of antennae extending beyond the uppei 
margin of the head by about one-third theu 
length or more. .2.-3= ee 18. Paratrechin: 
Fig. 16.—Diagnostic parts of male ants. A, Labidus, front wing; B, Myrmica, front wing; C, Stenamma, front view of he 
D, Pseudomyrmex, front view of head; E, Amblyopone, front view of head; F, Pheidole, front view of head; G, Neivamyrmex, ven 
view of subgenital plate; H, Labidus, ventral view of subgenital plate; I, Proceratium, lateral view of petiole and base of gaster 
Solenopsis, antenna; K, Dolichoderus, antenna; L, Myrmecina, front view of mandibles and labrum; M, Aphaenogaster, side viev 
head of small specimen; N, Aphaenogaster, side view of head of robust specimen; O, Tapinoma, front view of mandible; P, } 
mannia, side view of abdomen. 
(All except F, J, K, and N after M. R. Smith, courtesy of the American Midland Natura 
