No. 429.] THE FAMILY OF FORMICIDE. 723 
N 
» 
— 
D 
p 
N 
ui 
. Thorax and petiole without spines or teeth . . oles | 
sin and petiole, or the latter alone more or TA spinose or den- 
: 18 
: bed thickset ; vu BENO behind (hirik Pápiiasfi) 
Calomyrmex Emery 
Body slender; head narrowed behind (America) 
Dendromyrmex Emery 
Body thickset; thorax without spines, its anterior angles rounded; 
petiole prolonged into a point on either side .  Echin nopla F. Smith 
Body less thickset; thorax usually dentate or spinose (when this is 
not the case the body is T in black, and the scale of the sena 
is quadridentate) . . 19 
In profile, the mesonotum occupies dà TN of a TNR cleft over- 
arched by the metanotum ; eyes supported laterally by a lobe of the 
head in the form of a blinder (cillére) . . . Hemioptica Roger 
cit pdm not depressed; eyes usually free, rarely with a distinct 
blinder . ; . . * Polyrhachis F. Smith? 
« The sind 4 to 5 Multi joints distinctly differentiated to form a club 
ei esa Er. André 
No differentiated club 2 
. Calyx of gizzard reflected id a E a Md ring as in 
Plagiolepis (Australia, New Zealand, Chile). Melophorus Lubbock 
Sepals of calyx distinct and little or not at all reflected (except * Pren- 
olepis, none of these genera are found in Australia or Hi) oeza 
- Clypeal fovea distinctly separated from the antennal fovea 
* Prenolepis Mayr 
ys: fovea confluent with the antennal fovea, or feebly separated in 
Pseudolasius . 23 
. Joints 2-5 of the hiii diir or not fiare ds the succeeding 
joints ; ocelli usually a| 24 
Joints 2-5 of the i longer us: the Maple ux ioni: cilii 
distinc 25 
Mandibles a. with stique PEEN hladas ; doki very mike : 
head large in the worker major; clypeal fovea slightly separated 
from the antennal fovea (Sunda Islands and Moluccas) 
Pseudolasius Emery 
Mandibles shorter, with less oblique blades; dimorphism scarcely or 
not at all perceptible (holarctic region) . . . *Lasius Fabricius 
- 4th joint of maxillary palpi nearly twice as long as the sth 
* Myrmecocystus Wesmael 
ins = of the maxillary palpi a ks lta ge es mein; s. . 6 
late * Formica Linne 
Mandibles narrow and pointed vow ee Co F Pelyepus Latreille 
at ag! Simplex Mayr has been found in Palestine. Mr. Edward Saunders sent me 
e provenience of which appears to be authentic. 

