158 Transactions.— Zoology. 
antenus very small and slender at base of mandibles. Two large brown 
spots sub-lateral on metanotum; two smaller ones similarly situated on 
mesa- and pronotum. Abdomen of a lighter colour below, with eight trans- 
verse and equal corrugations above, each having five black hairy spots 
running in regular lines longitudinally. Legs (and mandibles) yellowish- 
brown, very hairy with spreading black hairs; ungues of posterior pair 
large, divergent, pieeous. Hairs of two kinds: (1) whitish, downy, and 
appressed; (2) black and bristly, and often in tufts, which are larger at the 
sides, the largest pair of tufts are marginal just opposite to the posterior 
legs. 
Hab. Hampden, Waipawa County; 1882: Mr. S. W. Hardy. 
Obs. "This species makes its pitfalls in sandy earth, just like the Euro- 
pean species M. formicarum. I kept several of these larve alive for some 
time (2-8 months) in light dry soil, they seemed to bear fasting very well. 
This is a much larger larva than that of M. acutus (?), which, I think, I 
knew, and often watched its habits, at the North, in forming pitfalls, ete., 
in sandy spots ; though I never met with the perfect insect of that species. 
Order HYMENOPTERA. 
Sub-Order Puprrora. 
Family IcuxEUuwoNIDE. 
Sub-Family Pimpiline. 
Genus Rhyssa. 
Rhyssa clavula, sp. nov. 
Female: Abdomen a rich dark-red-brown variegated with yellow: 
thorax, antenns (basal 3), ovipositor and its sheaths much darker brown 
almost piceous. i 
Head: orbits of eyes and post-elypeus yellow; two vertical ferruginous 
lines from base of antenne to mouth ; three ocelli in dark central band a 
little above the eyes; antenns filiform, curved, 18 lines long, finely annu- 
late (above 50 joints), and under a lens covered with excessively minute 
whitish lines, very slightly and finely hairy, basal joints knobbed with 
yellow margins, the lowest the longest, apical third flavescent, the 8 apical 
joints light-ferruginous: elypeus dark-margined, enclosing a light-ferrugin- 
ous triangular spot having a transverse red line, and a shorter brown one 
above it; labrum dark almost piceous (this dark band also surrounds the 
mouth); palpi light ferruginous. 
Thorax: the mesothorax transversely and finely ruguloso-striate; a 
large semi-curved triangular yellow spot on pleure of prothorax, another 
below junction of anterior wings, a smaller one above the junction (trans- 
versely barred with a narrow dark band), the bases of the wings, the scutel- 
lum, post-scutellum, and the apical portion of the metathorax (encircling 
