162 
somewhat wider than the last funicle joint and as long as the four pre- 
ceding joints combined. 
Mandibles rather narrow at apex with three acute teeth, of which the 
two ventral are subequal and not deeply divided from each other, the 
inner or dorsal tooth considerably smaller; base of mandible moderately 
wide and expanded nearly in the same plane as the apex. Palpi short, 
the maxillary pair three-jointed, with the apical joint tapering and equal 
Fig. 16. Euchalcerinys apicicornis. Mandible of female, dorso-anterior 
and anterior views. 
to the other two joints combined; labial palpi with three very short, 
equal joints, the two basal joints thickest at their union, the apical joint 
narrower and tapering. 
Thorax of normal structure and robustness, the notum strongly con- 
vex; mesoscutum twice as wide as long, its posterior margin nearly 
straight, or only slightly produced medially; axillae over twice as wide 
as long, their inner tips very acute and meeting; scutellum about as long 
as the mesosecutum, or as long as its own width at the base, the dise 
strongly convex, the apex bluntly rounded; propodeum extremely short 
medially, but moderately long at the sides. Abdomen as wide as the 
thorax and nearly as long, triangular-ovate in shape and acute at apex; 
the basal tergite very prominent, longitudinally convex, and almost one- 
half as long as the whole abdomen; following tergites deeply sunken in 
and, excepting the apical one, mostly withdrawn beneath the first ter- 
gite; ovipositor barely exserted and not enclosed by the ventrites except 
basally. 
Legs slender and rather longer than usual, the middle tarsi not much 
thickened at base and only slightly tapering, the spur of the middle 
tibiae slender and about two-thirds as long as the first tarsal joint. 
Wings large and broad, the venation much shorter than one-half the 
length of the dise; the submarginal vein close to the margin so that 
the costal cell is unusually narrow, marginal vein not much longer than 
wide and considerably shorter than the moderately long stigmal vein, the 
postmarginal vein very short and spur-like; speculum reaching nearly 
across the dise and widening below; dise beyond the speculum densely, 
uniformly pubescent, the setae in the basal area considerably sparser and 
larger, but becoming shorter and transparent towards the posterior margin, 
Face, cheeks, most of pleura, the scutellum and abdomen smooth, the 
