12 HYMENOPTEEA. 



J 15. Ammophila consors. (Tab. II. fig. 3, j.) 



JSlgra, capite et abdominis apice nigro-cseruleis, apice petioli abdominis segmentoque 2° rufis; clypeo fere 



truncato ; scutello punctato ; alis cum nervis fusco-hyalinis, vel flavo-fuscis. <$ $ . 

 Long. 18-24 millim. 



Hdb. Mexico, Temax in North Yucatan (Gaumer). 



Head broad, almost shining ; the front and vertex covered with a sparse, short, black, 

 depressed pubescence ; the clypeus with a longer silvery pubescence. Front acutely 

 depressed in the middle ; the central furrow distinct. Clypeus depressed inwardly at 

 the apex, which is broadly truncated, with the sides rounded ; the apex margined ; the 

 central region bearing some large punctures. Mandibles entirely black, shining ; the 

 basal part with elongated punctures. Third antennal joint fully twice the length of 

 the fourth. Prothorax elongate; a broad, shallow, oblique furrow on the sides. 

 Thorax almost shining ; covered with a depressed short pubescence ; the tubercles, a 

 broad oblique stripe on the mesopleurae, and a spot over the hind coxae, silvery. Meso- 

 notum with a broad moderately deep furrow in the centre, and there is a broader and 

 shallower depression along the sides of the tegulae ; two narrow furrows run down 

 from the tegulae, and a short transverse one branches off from the first. Scutellum 

 shining, slightly depressed in the middle ; almost impunctate, posteriorly irregularly 

 and indistinctly striolated in some specimens; postscutellum sometimes irregularly 

 punctured. Metanotum opaque, transversely striated. Abdomen shining; the apical 

 ventral segments with some longish hairs, the last closely punctured. In most speci- 

 mens the apical joint of the petiole is more or less black above, and the second 

 segment is sometimes black at the apex. The second and third cubital cellules 

 somewhat variable in size : generally above they are of nearly equal length ; the third 

 above is about three fourths the length of the bottom. Tibiae and tarsi rather strongly 

 spinose ; the metatarsal brush rufous. 



The specimens I take to be the male have the head and thorax more densely pilose ; 

 the apex of the clypeus depressed and a little incised in the middle ; the thorax punc- 

 tured ; the apex of the petiole and the second segment only black beneath ; the pleurae 

 with a continuous silvery pile; the furrow on the mesonotum shallower; and the head 

 and apex of the abdomen want the bluish tinge. 



The colour of the wings varies in both sexes : in some examples the apex is much 

 darker than the middle and base, but generally the colour is of uniform intensity. 



J 



16. Ammophila nigro-caerulea. (Tab. I. fig. 8.) 



Nigro-cserulea, sparse fusco-pilosa et argenteo-pubescens ; leviter punctata, scutello et metapleuris crebre 



punctatis ; metanoto trans-verse striolato ; abdominis segmentis 2° et 3° rufis ; alis fusco-byalinis. 

 Long. 12-14 millim. 



Hab. Guatemala, San Geronimo (Champion). 



The pubescence and hair on the head are rather sparse, as is also the punctuation. 



