268 WHEELER. 



2. Leptomyrmex erythrocephalus var. mandibularis var. nov. 



Worker. Differing from the typical form in sculpture and color. 

 The thorax, petiole, gaster, femora and tibiae seem to be of a deeper 

 black, because the pubescence is more scanty. The mandibles, 

 clypeus, except its posterior border, frontal carinse and antennal 

 scapes are black; the anterior portion of the cheeks and a broad 

 median streak on the gula are fuscous, the funiculi brown with reddish 

 tips, the tarsi brown, the hind metatarsi somewhat darker. The 

 surface of the body and head is distinctly smoother and more shining 

 than in the typical form. 



Described from a single specimen sent me many years ago by Mr. 

 H. Ashton from the vicinity of Sydney, New South Wales. 



3. Leptomyrmex erythrocephalus var. decipiens var. nov. 



Worker. Length 7-S mm. 



Differing from the typical form and the foregoing variety in its 

 smaller size and peculiar coloration. The head, thorax, petiole, coxae, 

 trochanters, knees, tibial spurs and tarsi are rufotestaceous, the gaster 

 black, the femora and tibije dark brown, the tips of the antennal 

 scapes more or less infuscated. 



Described from nine specimens taken at Gin-Gin, Queensland and 

 sent me many years ago by Mr. W. W. Froggatt. This variety, 

 which at first sight may be easily mistaken for a form of varians or 

 even more readily for nigrivcvtris var. tibialis, is here referred to ery- 

 throcephalus, because the head has precisely the same shape and the 

 femora and tibiae are flattened as in that species, whereas the tibiae 

 are more slender and terete in varians and the head is more slender 

 and conical behind. On the other hand, the head of tibialis, judging 

 from Emery's description, seems to be even broader than in the 

 typical nigriventris. 



4. Leptomyrmex erythrocephalus var. cnemidatus var. nov. 



Worker. Length 9 mm. 



Differing from the var. decipiens only in the coloration of the legs 

 and antennae, the latter being rufotestaceous throughout, like the head, 

 thorax and petiole, while the dark brown of the former is confined to 



