1956] 
Wheeler and Wheeler — Veromessor 
143 
with the tip bifid; (3) also longer, bifid, the branches 
short to long and recurved at the tip. Antennae minute. 
Head hairs moderately numerous, short, with the tip simple 
or bifid. Mandibles with the apex forming a long large 
round-pointed tooth which is curved medially; the two 
medial teeth prominent and round-pointed; a few spinules 
on the medial surface. Maxillae with the apex spinulose. 
Labium moderately spinulose. Dorsal portion of hypo- 
pharynx with sublongitudinal ridges ; ventral portion spinu- 
lose, the spinules minute and in numerous subtransverse 
rows. 
Veromessor lobognathus (Andrews) 
(Text figure 2) 
Body length (through spiracles) about 6.8 mm. Stout; 
diameter greatest at abdominal somite V, diminishing 
gradually to the anterior end and rapidly to the posterior 
end, which is broadly rounded. Whole body curved ven- 
trally. Anus ventral. Lateral longitudinal welts present. 
Leg, wing and gonopod vestiges present. Spiracles small; 
the mesothoracie the largest. No spinules seen on the in- 
tegument. Body hairs sparse, short and uniformly dis- 
tributed. Of three types: (1) 0.036-0.094 mm long, with 
the tip simple or bifid, on every somite, the most abundant 
type; (2) 0.094-0.156 mm long, with bifid tip, on the 
thorax and abdominal somites IX and x; (3) 0.078-0.156 
mm long, bifid, with the branches short to long and re- 
curved at the tip, on the metathorax and abdominal somites 
i-ix. Cranium subrectangular in anterior view, with the 
occipital angles rounded, slightly broader than long. An- 
tennae minute, each with three sensilla, each of which 
bears a spinule. Head hairs moderately numerous, slightly 
curved; short (0.036-0.086 mm long), with the tip simple 
or bifid. Labrum small, bilobed, breadth nearly twice the 
length; anterior surface of each lobe with 10 sensilla; 
ventral border with a few minute spinules; posterior 
surface spinulose, the spinules minute and in short arcuate 
rows, the rows transverse dorsally and longitudinal ven- 
trolaterally ; posterior surface with two isolated sensilla 
