avheeler: the ants of borneo. 77 



This species is quite distinct from the other East Indian Physo- 

 cremas, especially dcformis, inflata, and tumichda Emery, and easily 

 recognized by its large size, coarse sculpture, and well-developed 

 epinotal spines. It is much more closely related to a form described 

 by Forel from Malacca as C. dcformis subsp. vacca (Bull. Soc. Vaud. 

 sci. nat., 1911, ser. 5, 47, p. 384) but which, I believe, should be re- 

 garded as an independent species. This Malaccan form, however, is 

 black, measures only 3.3-3.5 mm., and has the epinotum much less swol- 

 len, and apparently even less distinctly constricted off from the mesono- 

 tum than in stdJiogompha, and the postpetiole is sulcate dorsally. It 

 is, perhaps, admissible to regard stcthogompha as a subspecies of vacca. 



*82a. Ceematogaster (Physocrema) stethogompha var. detri- 



TiNODis, var. nov. 



JVorkcr. Length 3.5 mm. 



Differing from the typical form in having the head less distinctly concave 

 behind and in sculpture, the rugae of the head and thorax being finer, so that 

 the dense puncturation is more apparent and the vermiculate rugosity of the 

 thorax is laxer and finer, especially in the middorsal region. The petiole and 

 postpetiole are shining, the former elongate elliptical, the latter with a distinct 

 median furrow. Mandibles more yellowish than in the typical form. 



A single worker from the Sarawak River, Kuching (H. W. Smith). 



83. Crematogaster (Oxygyne) daisyi Forel. 



Cremastogaster {Oxygyne) daisyi Forel, Ann. Soc. ent. Belgique, 1901, 45, p. 

 376, ^ 9 . 



Type-locality: Sarawak (Haviland). 



84. Crematogaster (Decacrema) decaaiera Forel. 



Cremastogaster (Decacrema) decamera Forel, Ann. Soc. ent. Balgique, 1910, 54, 

 p. 18 nota, ^ 9 d'. 



Type-locality: Sarawak f^Haviland). 



Five workers and a dealated female from Kuching (John Hewitt), 

 "from Macaranga with slightly trifid leaves," and a winged female 

 from British North Borneo (E. B. Kershaw). 



