442 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
coarsely striolate. Petiole and postpetiole rugosely punctate. Gaster 
subopaque, densely punctate, with a few erect black hairs. 
Color black, except the head, which is somewhat reddish. 
Described from six workers taken near Manaos. This form, which 
is named after Don Antonio Autrun, our genial host at Kete Purangi, 
differs from C. stolli in the shorter antennal scapes and in sculpture 
and color, besides being smaller. The epinotal spines are shorter 
and thicker and the head and thorax lack the long, erect hairs of C. 
stolli. Jam in doubt whether C. autruni should not be considered as 
specifically distinct rather than as a subspecies. 
99. Crematogaster (Crematogaster) heathi, sp. nov. 
Plate 3, fig. 27. 
Worker. Length 2.5 mm. 
Head about as broad as long, with slightly convex sides and broadly 
rounded occipital corners; occiput faintly excavated. Eyes small, 
little convex, located at sides of head slightly posterior to middle. 
Mandibles short and stout, the blade strongly concave. Antennal 
scape not reaching the occipital corners; funicular joints, except 
those of the club, subglobose, as broad as long. Clypeus quadrate, 
as broad as long, the anterior border broadly rounded. Prothorax 
subglobose; pronotum as broad as long, with narrowly rounded sides, 
so that the disc is transversely oval, broadly rounded above. Epino- 
tum, with a very short base, which is narrowly rounded, giving in 
profile the appearance of a tubercle; the declivity is three times as 
long as the base, with a broad, flat surface, on either side of which is a 
strong spine curving outward and upward. Petiole flattened above, 
not quite so broad as long, with straight posterior margin; postpetiole 
subglobular. Gaster short and broad, triangular. 
Head. shining, minutely punctate throughout, the front with sparse, 
coarse punctures. Thorax, petiole, postpetiole, and legs sublucid. 
Gaster subopaque, densely punctate. Head and thorax, petiole and 
postpetiole in front sparsely pilose, the pile fine and recumbent. 
Antennee, legs, and abdomen with erect pilosity. 
Color red, except the gaster, which is black, and the legs, which are 
somewhat infuscated. Pile and pubescence yellowish. 
Described from a large number of workers taken from twigs at 
Independencia. This species is related to C. brevispinosa from which 
it differs in the structure of the epinotum and in the absence of teeth 
