Wheeler and Wheeler — Myrmicine Larvae 143 
moderately numerous and short. Of two types: (1) about 
0.036 mm long, deeply bifid, with the branches curled away 
from each other, without alveolus and articular membrane, 
the most common type; (2) a few, 0.027-0.045 mm long, 
with short-bifid tip, with alveolus and articular membrane, 
restricted to the ventral surface of the abdomen and to 
the ventral and ventrolateral surfaces of the thorax. In- 
tegument of ventral surface of thorax and abdominal so- 
mites I and II with rather long transverse rows of spinules. 
Labium with an isolated sensillum between each palp and 
the opening of the sericteries. Otherwise similar to lignata. 
(Material studied: a dozen damaged larvae from British 
Guiana.) 
Genus Paedalgus Forel 
Abdomen spheroidal; thorax forming a short stout neck 
which is arched ventrally. Body hairs short and moderate- 
ly numerous. Of two types: (1) deeply bifid, with the 
branches curling away from each other, the most abundant 
type; (2) a few with bifid tip, on the ventral surface. Head 
hairs few and short, those above the antennal level deeply 
bifid, those below with bifid tip. Labrum small and sub- 
rectangular ; posterior surface apparently without spinules. 
Mandibles short and stout; anterior surface produced into 
a medial blade which bears two stout medial teeth ; posterior 
surface with one medial tooth. Maxillary and labial palps 
each represented by a cluster of four sensilla. 
Wheeler, 1922, p. 119: ‘That the salivary glands may 
be important as exudate organs throughout life is indicated 
by certain genera of Myrmicinae (e.g., Paedalgus), the 
larvae of which have no exudatoria but greatly developed 
salivary glands, though the latter are never used for spin- 
ning cocoons in the prepupal stage.” (Mentioned by Wheeler 
1928, p. 233 = 1926, p. 281.) 
Paedalgus termitolestes Wheeler 
(PI. 6, figs. 24-27) 
Abdomen spheroidal; thorax forming a short stout neck 
which is arched ventrally; segmentation indistinct (ac- 
cording to W. M. Wheeler). Integument of ventral surface 
of thorax with rather long transverse rows of minute 
