
716 THE AMERICAN NATURALIST. [Vor. XXXVI. 
MT 
_ 
. Antennal fovez shallow, at the medial side of the eye; antenne 
5-jointed, the third much elongated . . Mp dito. F. Smith 
Of a different conformation . 12 
12. Antennal fovez placed at the oval. or medial side of the eyes. . .13 
Antennal fovez placed at the lateral side of the eyes . 14 
in Antenne Gjointed 44 orn ee Sienai F. Smith 
BM MM E ns iby oak out Eprtbus Emery 
14. Antenne 6-jointed. . . . . . . . . . + Epopostruma Forel 
Antenne 7-G-jointed . . . . « «s s Rhopalothrix Mayr 
Antenne I2-jointed . . Ceratobasis F. Smith 
15. Antenne II-jointed, nihoni distinct clots or a club consisting of a 
single joint (tribe Attii, America) . . 
Club of several joints, or the antennz not I pAn 20 
Frontal carinæ very close to each other and dilated at ies anterior 
extremity ; clypeus not distinctly prolonged between them . 17 
Frontal carina Donee embracing the posterior — of the 
clypeus 18 
. Integument opaque "m even, bristling with tng, bs parts 
Apterostigma Mayr 
sprig are bristling with tubercles and spines, with hooked and scale- 
like hairs . . . Myrmicocrypta F. Smith 
18. No erect in on the bodri $ eion idt usually prolonged to the 
posterior corners of the head . . . . . Cyphomyrmex Mayr 
Body bearing erect hairs . i 19 
Integument even, bearing adiy délicate eique haies 
Sericomyrmex Mayr 
Integument rough, bearing stiff or hooked hairs . . Atta Fabricius 
20. The shallow antennal foveæ bordered laterally by an abrupt carina ; 
antennæ 11-jointed, with a club of three joints, the last of which is 
decidedly predominant . . . . = +++ - * - . 2I 
Of a different conformation x 
Lad 
D 
= 
“I 
kam 
Cie arched both longitudinally and transversely Wasmannia Forel 
22. Club of the antennæ 2-jointed, the last joint much larger than the other 
(tribe Solenopsidii and the genus Phacota) euo 23 
Antennal club of a different conformation or indistinct è 28 
. Antennæ 9-jointed (1o-jointed in the female and 1:3-iointed. in in the 
male)!; no dimorphism among the workers . Carebara Westw 
Antennz 12-jointed . : . . .-. Adelomyrmex Emery 
Antenne 10- or fy jetted”. du: 
N 
c2 
1 Professor Forel refers to the genus Oligomyrmex Mayr, the worker of which 
is unknown, an undescribed Australian species with strongly — workers. 
The antennze are 9-jointed, as in Carebara worker and in Oligom yrmex fe male. 

