96 
Psyche 
[June 
sented by a soldier phase (Fig 2) with anteriorly broad head 
and convex blunt-toothed mandibles and a worker phase 
proper with anteriorly narrower head and acute mandibles, 
but Arnold 5 , who examined a long series of this species, 
finds a complete gradation between the two forms. 
Several years ago Viehmeyer sent me eleven workers 
and two immature males of a Rhopalmoastix belonging to 
a series taken by H. Overbeck at Singapore. Viehmeyer 6 had 
recorded them as belonging to Rh. rothneyi, but on compar- 
ing them with Forel’s description I find that they differ in 
size and coloration and therefore probably represent a dis- 
tinct subspecies, which is here described : 
Rhopalomastix rothneyi Forel subsp. johorensis subsp. 
nov. 
Worker. Length 2 - 2. 6 mm. 
Distinctly larger than the typical rothneyi , which meas- 
ures only 1.7 - 1.8 mm. Head scarcely longer than broad (1 
1/6 longer than broad in rothneyi) and with somewhat smal- 
ler eyes (18 to 15 facets, instead of about 20). Head and 
thorax rich ferruginous red ; appendages, abdomen and sides 
and declivity of epinotum clear brownish yellow. 
I have recently received another series of specimens, 
comprising all three phases of a second subspecies of roth- 
neyi from Java, which may be described as : 
Rhopalomastix rothneyi subsp. javana subsp. nov. (Fig. 
1) 
Worker. Length 1.3-1. 8 mm. 
Averaging smaller than the typical form of the species. 
Head not longer than broad; thorax shorter, only 12/3 
times as long as broad, with the epinotum distinctly nar- 
rower than the promesomotum. Median tooth of the anterior 
clypeal border very indistinct. Eyes smaller, consisting of 
only 12 to 14 facets. Sculpture finer than in the subsp. joho- 
rensis; color similar, but the head and thorax more yellowish 
ferruginous, the gaster clouded with brown apically. 
5 Arnold, G. A Monograph of the Formicidae of South Africa, Ann. South 
Afr. Mus. 1916 p. 188 nota. 
6 Viehmeyer, H. Ameisen von Singapore. Arch. Naturg. 81, (1919) 1916 p. 
108-168, 15 figs. 
