132 Psyche [August 
to examine quite a number of specimens of D. theryi of the Baltic 
amber, but all of these were monomorphic. 
In 1894 Emery described a female ant from Borneo as Dimor- 
phomyrmeax andrei’ with eight-jointed antenne, but he concluded 
that this was an Aphomomyrmez after he had seen A. afer. Each of 
the two genera is therefore represented by two species, as follows: 
Dimorphomyrmex Ern. André. 
1. D. janeti Ern. André, Mém. Soc. Zoél. France, 1892, pp. 49-51, Figs. 4 
and 5, soldier, worker; Emery, Ann. Soc. Ent. Belg. XLIII., 1899, p. 
494, nota, worker; Borneo; Sumatra. 
. D. theryi Emery, Bull. Soc. Ent. France, 1905, p. 188, Fig. 1, 2; Baltic 
amber. 
LS9) 
Aphomomyrmex Emery. 
1. A. afer Emery, Ann. Soc. Ent. Belg. XLIII., 1899, pp. 493-496, 1 fig. 
worker, 2 ¢; Kamerun. 
2. A. andrei Emery. Ann. Soc. Ent. Belg. XLIII., 1899, p. 894, ?= Dimor- 
phomyrmex andrei Emery, Ann. Soc. Ent. France, 1894, p. 73, 2; 
Paulo-Laut, Borneo. 
Among some Bornean ants collected and recently sent me by Mr. 
John Hewitt of the Transvaal Museum, I find two females and 
several workers of a third species of Aphomomyrmea of which I 
subjoin a description. 
Aphomomyrmex hewitti sp. nov. (Fig. 1.) 
Worker maxima, Length 3-3.5 mm. 
Head flat, nearly as convex below as above, subrectangular, longer than 
broad, with straight subparallel sides, rounded posterior and blunt anterior 
corners. Eyes small, elliptical, flat, placed near the middle of the sides of 
the head and not on its upper surface. Ocelli present in some specimens but 
very small. Clypeus large, feebly convex behind, depressed in front, its 
anterior border rounded in the middle, not projecting, its posterior border 
not projecting back between the frontal carinz to any appreciable extent. 
Frontal caring very small and short, the distance between them little more 
than half the distance between each of them and the corresponding lateral 
border of the head. Frontal area obsolete, frontal groove tenuous, but dis- 
tinct. Mandibles small, with parallel internal and external borders and four 
sub-equal teeth; outer border with a blunt tooth near the base. Antenne 
8-jointed, short; scapes rather slender, straight, reaching only a short dis- 
tance behind the eyes; first funicular joint slender, twice as long as broad, 
remaining joints slightly enlarged towards the tip of the antenna; joints 

1 Descriptions de deux fourmis nouvelles. Ann. Soc. Dnt. France, 1894, p. 78. 
