222 
Psyche 
[September-December 
Fig. 1, Pilotrochus besmerus, new genus and species, holotype worker, head in 
dorsal view, tilted back slightly from the full-face position so as to show the man- 
dibular dentition better, X67. Drawing by Susan Poulakis. 
Hairs mostly a little less than 0.1 mm long on anterior head and 
scapes, a little more than 0.1 mm on posterior vertex; 0.15-0.25 on 
trunk, petiole, postpetiole and gaster, becoming shorter again at 
gastric apex; about 0.1 to about 0.3 mm on legs; flagelliform, many 
with tips reflexed or even looped back. 
Holotype (Museum of Comparative Zoology at Harvard Univer- 
sity) a unique worker taken in a Berlese sample of forest humus 
and litter from along the road to Anosibe, 33 km south of Mora- 
manga, in east central Madagascar, 4-12 April 1975 (A. Peyrieras). 
The relationships of Pilotrochus are obscure. The shape of the 
head, with its broad and deep scrobes and small ventrolateral eyes, 
recalls that of Dacetinops, or the Codiomyrmex group of Dacetini, 
or even Tatuidris, but Pilotrochus differs strongly from all of these 
in its 8-segmsnted antennae, in the form of its mandibles and their 
teeth, and in the form of its trunk and petiole. The lateral “hair- 
k 
