Vou. II, Pr. II] WHEELER—GALAPAGOS ISLANDS ANTS 275 
Subfamily DOLICHODERIN. 
13. Dorymyrmex pyramicus albemarlensis, new variety 
Worker. Length 2.3—2.5 mm. 
Resembling the var. bicolor Wheeler, but smaller and the 
head somewhat narrower and longer, with nearly straight sides 
and the epinotal cone smaller. The eyes are small, just in 
front of the middle of the head. Sculpture, pilosity and color 
as in bicolor, the head, thorax and antennal scapes a little more 
sordid red, the funiculi, petiole, gaster and legs dark brown or 
blackish. 
Five workers from South Albemarle (F. X. Williams) and 
19 workers from the same island taken by the “Albatross’’ in 
1899 (U. S. Nat. Mus.). This form is very closely related to 
one of which several specimens were sent me by Mr. C. H. 
Tyler Townsend from Piura, Peru. The Peru form may be 
designated as peruvianus, new variety. It measures 2.5-3 mm. 
and is therefore as large as var. bicolor. ‘The head is shaped 
like that of albemarlensis but the epinotal cone is as large as in 
bicolor and rather blunt. The color, however, is different, the 
head, thorax, petiole, legs, scapes, bases of funiculi and ex- 
treme base of the first gastric segment being clear, bright yel- 
low, the remainder of the gaster black. The head is very 
smooth and shining, the remainder of the body a little more 
opaque, the pubescence is finer and less conspicuous. 
Cotypes, 2 specimens, No. 448, Museum California Academy 
of Sciences; also 2 paratypes from Albatross collection of 1899. 
14. Tapinoma melanocephalum Fabricius 
Formica melanocephala Fabricius, Ent. Syst. 2, 1793, p. 
353 8. 
- Lasius melanocephalus Fabricius, Svst, Piez. 1804, p. 417. 
Myrnuca melanocephala Lepeletier, Hist. Nat. Insect. Hy- 
men. !', 1836; p. 185. 
Formica nana Jerdon, Madras Journ. Litt. and Sci. 17, 1851, 
pe Zils .er 
Myrmica pellucida F. Smith, Journ. Proc. Linn. Soc. Zool. 
2. NSSA pe Fle Se 
