566 THE AMERICAN NATURALIST. | [Vor. XXXIV. 
?4. Length 13.5 mm. Light reddish brown, articulations 
of antenne and legs and a large oblong blotch on either side of 
the metanotum, extending over the posterior third of the meso- 
notum, black. Surface of head, thorax, and abdominal pedicel 
subopaque, coarsely and rather densely punctate. Abdomen and 
legs shining, more finely and sparsely punctate. Body covered 
with delicate golden-yellow hairs, long on the legs and on the 
sides and tip of the abdomen, short and erect on the head. 
Head large, swollen, subcordate above the clypeus, broader 
in front than behind; posterior angles rather prominent, but not 
acute as in the worker. Eyes vestigial like those of the 9; ocelli 
absent. Mandibles slender, pointed, without distinct teeth. 
Down the middle of the head from the clypeus to the occiput runs 
a distinct furrow, deepest anteriorly. Antennal scape short, in- 
crassated; funicle consisting of subequal joints,except the last, 
which is twice as long as any of the preceding. Legs short, tibie 
and femora compressed antero-posteriorly. Thorax slender, elon- 
gate, without any traces of wings; suture between the pronotum 
and mesonotum faint but distinct, metanotum broader than the 
mesonotum, both flattened dorsally and distinctly impressed along 
the medianline. Posterior surface of thorax declivous, bearing on 
each side near its lower posterior corner a small but distinct 
tooth. Abdominal pedicel consisting of a single node which is 
nearly square, being somewhat broader than long, with its ante- 
rior somewhat shorter than its posterior edge, flattened dorsally 
and with a slight longitudinal impression in the median line. 
?5. Length 17 mm. Dark rufous brown, legs somewhat 
lighter, black spots on the metanotum inconspicuous, with in- 
distinct contours. Surface of the head, thorax, and abdominal 
pedicel more coarsely and confluently punctate than in 944; 
the mesothorax somewhat transversely wrinkled. 
Head proportionally smaller than in 9.4. Furrow down the 
middle of the mesonotum and metanotum and the abdominal 
pedicel much deeper. Abdomen with the exception of the 
first segment greatly enlarged, so that the dorsal and ventral 
sclerites are separated from one another by the tense interscle- 
ritic membrane. This is thin and transparent, but appears 
milk-white owing to the underlying eggs. 
