428 Timehri. 
Ammophila lobicollis, sp.n. 
Black, the face, clypeus, a band round the tubercles, a longish triangular 
spot on the lower apical part of the mesopleure, a spot behind the metanotal 
spiracles and a triangular spot on the sides of the apex of metanotum, all of 
white silvery pubescence ; wings hyaline, slightly suffused with fuscous, the 
stigma and nervures black ; the 1st abscissa of radius one-third longer than the 
2nd, which is half the length of the 3rd ; the 3rd transverse cubital nervure is 
broadly rounded posteriorily, the 2nd is slightly rounded outwardly behind; 
the Ist recurrent nervure is received in the middle of the cellule. Apex of 
clypeus with a semi-circular depression in the middle of the apex, the apex 
obliquely projecting, transverse. yes slightly converging above ; the hinder 
ocelli separated from each other by a slightly less distance than they are from 
the eyes. Apex of pronotum trilobate, the middle lobe the larger, separated in 
front by an oblique furrow. Middle of scutellum depressed, the apex strongly 
irregularly striated. Metanotum closely transversely striated, the strie 
becoming gradually stronger towards the apex, those on the apical slope more 
widely separated, more rounded and stronger. Mesopleure with distinct 
scattered punctures. Metapleure closely obliquely striated. There is a fine 
keel down the centre of the basal half of the metanotum. Female. 
Length27 mm. 
Allied to A. auronotata, Cam. and A. miliaris, Gam. both of which diffe™ 
from it in having the mesonotum striated. 
Ammophila guvana, sp.n. 
Black, the dilated apical part of the abdomen blue, the face and clypeus, a 
band behind the tubercles, a longish conical spot in the middle of the apex 
of the mesopleure, an iregular spot, twice longer than wide, behind the 
metanotal spiracles, a spot double the size of the latter and twice longer than 
wide and slightly oblique, on the side of the apex, close to the metapleural 
furrow and the hind coxe, of silvery pubescence. wings hyaline, the nervures 
and stigma black ; the Ist abscissa of radius curved, about one-quarter longer 
than the 2nd which is as long as the 3rd ; the ist recurrent nervure is received 
shortly, but clearly before the middle of the cellule, the 2nd near the apex. 
Apex of pronotum broadly, roundly raised in the centre, the raised part border- 
ed by shallow oblique depressions. The centre of the mesonotum is raised, 
more distinctly so and more clearly limited at the apex than at the base ; there 
are some stout widely separated stria on the apex of the post-scutellum. 
Metanotum closely transversely striated. Propleurt smooth. Mesopleure 
with strong scattered punctures. Eyes a little converging above ; the hinder 
ocelli are separated from each other by a slightly less distance than they are 
from the eyes ; there is a distinct furrow joining the hinder behind ; a shallow 
furrow runs down from the ocelli. The tibize are sparsely, the tarsi are 
densely, stoutly spinose. Female. 
Length 25 m.m, 
