146 bulletin: museum of comparative zoology. 



Smooth and shining; thorax subopaque, finely punctate-rugulose. 

 Pilosity as in the female but somewhat sparser and finer. 

 Castaneous brown; pronotum and head paler and more reddish; palpi and 

 tarsi beyond the first joint, whitish. 



Described from a single female and three males. More material may 

 show that this form is merely a pale race, or subspecies of donisthorpei. 

 The color of the female before me is certainly not due to immaturity. 

 Dr. F. X. Williams has recently sent me a male and female of another 

 species, M. iviUiamsi, sp. nov., from the Philippines, the fourth species 

 of this remarkable genus to come to light in the Malayan subregion. 

 The female is larger and more robust than donisthorpei and bakcri, 

 with the head and thorax rich reddish brown, opaque, and very finely 

 and densely punctate and the basal half of the swollen middle and 

 hind tibiae black, the apical half yellow. The male is black, with pale 

 terminal tarsal joints and the head and thorax are densely punctate- 

 rugose. The worker is known only of the type-species, M. binghami 

 Forel of Burma. 



22. Camponotus (Myrmotarsus) mistura (Smith) y . 



(A7ite, p. 109). 



*23. Camponotus (Myrmotarsus) satan, sp. nov. 



Female. Length: 18 mm.; wings 19 mm. 



Head subtrapezoidal, broader than long without the mandibles, much 

 broader behind than in front, with straight sides and broadly excised posterior 

 border. Eyes moderately large and convex. Mandibles large, convex, 

 with 6 large, subequal teeth. Clypeus broader than long, rather flat, ecari- 

 nate; its anterior margin straight and transverse in the middle, with a small 

 tooth in each side and feebly concave lateral to each tooth. Frontal carinae 

 slightly diverging behind and not strongly curved . Antennal scapes decidedly 

 flattened, reaching to the posterior corners of the head. Thorax and legs as 

 in the other species of the subgenus. Petiole broad, cuneate in profile, its 

 anterior and posterior surfaces flat, its superior margin moderately sharp, 

 feebly and sinuately emarginate. Gaster considerably shorter than the 

 thorax. Tibiae and middle and hind metatarsi flattened as in other species 

 of the subgenus. Wings long. 



Very smooth and shining except thei sides of the thorax and the top of the 

 head, which are opaque. Mandibles, clypeus, and cheeks sparsely punctate, 

 the punctures becoming finer and denser on the sides of the head; the opaque 

 dorsal portion sharply and finely coriaceous. 



