The Hymenoptera of the Georgetown Museum. 429 
Ammophila oxystoma, sp.n. 
Black, the face and clypeus densely covered with golden pubescence, a band 
round the apex of the tubercles, a conical spot, sharply narrowed below, round- 
ea above, shortly below the middle of the apex of mesopleure, an irregular 
spot behind the spiracles, a longish spot on either side of the apex of the me- 
tanotum, rounded above, gradually narrowed below of silvery pubescence, 
the apical spots slightly tinged with gold ; wings hyaline, the nervures and 
stigma black, the Ist and 3rd abscisse of radius equal i in length, the 2nd about 
half their length ; the Ist recurrent nervure received shortly ‘before the middle, 
the 2nd fully half the length of the 2nd abscissa of the radius from the 3rd. 
Pronotum broadly rounded, neither raised nor depressed in the middle. 
Mesonotum sparsely punctured, slightly raised in the middle. Apical slope of 
metanotum striated, the central strie stronger and more widely separated, 
the lateral oblique. Pro and mesopleure sparsely punctured; the upper 
apical half of the metapleure finely closely obliquely striated ; this striated 
part is divided into 2 by a strong, somewhat oblique keel, the apical part 
being more strongly striated than the basal. Metapleure closely, obliquely 
striated, more strongly so than the mesopleure, the apical part more strongly 
than the basal. Male. 
Length 23 m.m. 
Eyes slightly converging below. Hinder ocelli separated from each other 
by a little less distance than they are from the eyes. Clypeus long, gradually 
narrowed from the eyes to the apex, which forms a projecting, tooth-lke 
point. The furrow leading down the front from ocelli is stronger on the upper 
than on the lower half. 
Ammophila pilimaryinata, sp.n. 
Black, the underside of the lst abdominal segment, the sides and ventral 
surface of the 2nd, its apex narrowly above, the 3rd, except for a mark in the 
centre of the apex, its base roundly narrowed and the sides and ventral surface 
of the 4th at the base, the lateral mark narrowed above, ferruginous ; the 
apical abdominal segments are tinged with blue. Face, clypeus, the tubercles 
behind, a broad band of equal width on the mesopleure, running down from the 
tegule to the middle coxe and a large irregular spot on either side of the 
metanotum of silvery pubescence ; wings hyaline, the apex slightly infuscated, 
the nervures and stigma black ; the basal abscissa of the radius as long as the 
2nd and 3rd united, the latter 2 of equal length ; the 1st recurrent nervure is 
received near the apex of the basal third Eyes distinctly converging below. 
Hind ocelli separated from each other by a distinctly less distance than they 
are from the eyes. Pronotum large, nearly as long as it is wide at the apex, 
which is broadly rounded. Mesonotum irregularly transversely striated, the 
base less strongly than the apex. Scutellum strongly striated the central 
more or less curved. Post-scutellum strongly transversely striated. Metano- 
tum strongly transversely striated ; the metapleure below the furrow, strong- 
ly, but not closely punctured, the base above smooth. The spines on the 4 
front legs are white, on the hinder black ; the spurs black, testaceous at the 
apex. 
