118 bulletin: museum of comparative zoology. 



but not reaching the anterior ocellus. Frontal carinae sinuous, diverging 

 behind. Antennae inserted some distance behind the clypeus; the scapes 

 terete, slightly thickened at their tips, reaching a little beyond the posterior 

 corners of the head; funicular joints all very distinctly longer than broad. 

 Thorax very regularly elongate-elliptical, nearly 2^ times as long as broad, as 

 broad as the head. Mesonotum convex and rounded in front, flattened be- 

 hind, as long as broad. Epinotum with distinct base and declivity, the former 

 about half as long as the latter, meeting it at a rounded right angle. Petiole 

 low and small, the node very blunt and rounded, about twice as broad as long. 

 Gaster regularly elliptical, a little shorter and broader than the thorax. IjCgs 

 rather short. 



Subopaque; head in front and especially the mandibles more shining; 

 mandibles and clj'peus very finely and sparsely punctate; remainder of the 

 body very finely and densely punctate, with coarser, sparse, piligerous punc- 

 tures, most distinct on the front and posterior portion of the head. 



Head, thora.x, and gaster with very sparse, delicate, erect, blunt, blackish 

 hairs; antennae and legs with short, sparse, appressed, rather indistinct, pale 

 pubescence. 



Black or very dark brown; mandibles, except their teeth, clypeus, cheeks, 

 sides of front, antennae and their insertions, reddish yellow. Gaster milk- 

 white, dorsal surface black, with a large, median, irregularly elliptical white 

 spot, extending from the anterior third of the first to the posterior border of 

 the fourth segment; the posterolateral margins of the second to fourth seg- 

 ments also white; anal segment black, with yellowish tip. Wing-insertions, 

 coxae, and trochanters white; tarsi, anterior surface of the fore legs and ventral 

 portions of the fore femora brownish yellow. 



Described from a single specimen taken by Mr. E. B. Kershaw in 

 British North Borneo. 



This species is readily distinguished by its unusual coloration from 

 any of the Colobopsis of which I have seen specimens or descriptions. 

 Its small size indicates that the workers must be diminutive, like those 

 of the European and North American species.^ 



184. Camponotus (Colobopsis) gilviceps Roger. 



Formica ruficeps Smith, Journ. Proc. Linn. soc. London. Zool., 18-57, 2, p. 54, 



y {nee Fabricius). 

 Camponotus gilviceps Roger, Verzeichn. formicid., 1863, p. 3; Forel, Ann. Soc. 



ent. Belgique, 1909, 53, p. 57 nota. 



1 Since the foregoing description was written I have received from Dr. J. W. Chapman a 

 fine series of the soldiers and workers of this ant taken at Dumaguete, Negros Oriental, in The 

 Philippines. The soldiers are colored like the female, but in the worker the white gastric spot 

 is shorter, extending only to or slightly beyond the posterior margin of the second segment. 



