1959] 
Brown — Ant genus Strumigenys 
49 
Pilosity conspicuous and abundant, particularly on head. Ground 
hairs spoon-shaped, subreclinate, curved forward and more or less 
mesad on dorsum of head ; mandibular hairs pointed, dense, appressed, 
except for the row of large oblique hairs on each inner margin. A 
very few inconspicuous, narrowly spoon-shaped hairs on promesono- 
tum. Larger, erect, remiform to clavate hairs: 2 pairs on head (Fig- 
ure 9); one humeral and one median pair on pronotum ; 3-5 pairs 
on mesonotum ; 2 pairs on petiolar node; 3 pairs on postpetiole; about 
6 rows of 6 hairs each on gastric dorsum. 
Color medium ferruginous ; a sample from Guatemala is more yel- 
lowish, but may be faded. 
The female differs from the worker in the usual ways, and is only 
slightly larger. 
Male (taken from nest series with workers, Mixco, Guatemala) : 
TL 2.2, HL 0.43, WL 0.65, greatest diameter of compound eye 0.20, 
forewing L 1.9 mm. Mandibles vestigial, not opposable, with trun- 
cate apices. Notauli indistinct. Propodeal teeth well-developed and 
acute. Petiole slender, with a long, low node. Gaster and mesokate- 
pisternum smooth and shining, body otherwise densely punctulate, 
opaque. Fine slender erect hairs corresponding in large part to the 
erect hairs of worker and female, but only some of those on the ali- 
trunk are broadened at their apices. Head blackish-brown ; body 
ferruginous brown; mouthparts and appendages brownish-yellow. 
Venation of forewing as in Smithistruma pergandei (Emery), 
shown in Wheeler’s “Ants,” fig. 11D. Hind wing with 5 submedian 
hamuli. Volsella of genitalia shown in Figure 7. 
Distribution: Known from southeastern and northeastern Brazil 
and Trinidad, so probably widespread also in the sparsely collected 
interior of South America. Common through Central America into 
southern Mexico. Except for Trinidad, unknown in the West Indies. 
Localities for material examined : Brazil : Santa Catarina State, 
without further locality (Hetschko leg.), syntype of subedentata in 
MCZ. Agudos, S. Paulo State (W. W. Kempf leg.). Belem, Para 
State (W. Beebe leg.). Trinidad: St. Augustine; Fyzabad; foot- 
hills north of Tunapuna; Arima-Blanchiseusse Road (all N. A. 
Weber leg.). Panama Canal Zone: Barro Colorado Island (leg. 
J. Zetek, N. A. Weber, E. C. Williams, Jr., E. S. McCluskey, W. L. 
Brown, Jr.), several collections, mostly from leaf litter and upper 
soil berlesates in forest. Costa Rica: Orijuaco (Tristan leg.), syn- 
types of tristani in MCZ. Turrucares (no collector cited). Guate- 
mala: Trece Aguas, Alta Vera Paz (Schwarz and Barber leg.), 
