AMMOPHILA. 13 



The front is deeply depressed and has a distinct furrow. Clypeus transverse ; its furrow 

 not very deep or broad. Ocelli forming almost a triangle. Third antennal joint 

 twice the length of the fourth. Prothorax moderately elongate, and with two oblique 

 lateral furrows. On the thorax the hair is shorter, paler, and thicker ; the pubescence 

 is very dense and silvery on the pleurae and on the apex of the metathorax; the 

 punctuation is shallow, but close — on the scutellum it is closer and coarser, and on 

 the postscutellum it is still stronger and almost rugose ; the furrow on the mesonotum 

 is broad and moderately deep ; two furrows run down from the tegulee, the first 

 emitting a short transverse one ; the metanotum has the transverse striation strong and 

 rugged, and is depressed in the centre. 



17 Ammophila montezuma. (Tab. I. fig. 15.) 



Nigra, argenteo-pubescens, capite et tborace dense cinereo-pilosis ; crebre punctata ; clypeo inciso ; scutello 

 punctato ; metanoto transverse striolato ; apice petioli abdominisque segmentis 2° et 3° lateribus ventreque 

 rufis ; alis fere hyalinis, apice fumatis. c? . 



Long. 25 millim. 



Hal. Mexico, Northern Sonora {Morrison). 



The face has a long, dense, silvery pubescence ; the front and vertex are almost bare ; 

 the hair is moderately thick, longish, and cinereous. Front moderately depressed ; the 

 furrow shallow. Clypeus incised. Posterior ocelli separated from each other by 

 a space equal to that between them and the eyes. Third antennal joint hardly one 

 quarter longer than the fourth. Prothorax with an indistinct oblique lateral furrow. 

 Thorax closely punctured, the scutellum rather sparsely so ; the hair is rather long, 

 very dense, and cinereous. There is a dense silvery pile on the prothorax, on the 

 tubercles, obliquely on the pleura?, and on the apex of the metanotum. The central 

 furrow on the mesonotum is very indistinct; and there is none on the pronotum ; a 

 narrow furrow runs down from the tegulse ; the centre of the metanotum is slightly 

 hollowed. Legs covered with a short hoary pubescence, the coxae with long silvery hair ; 

 the tarsi incline to piceous. The first joint of the petiole is only reddish at the extreme 

 apex; the second joint is entirely reddish, except a black line above ; the first segment 

 is red beyond a line in the centre above (the black not touching the base and apex) ; 

 the second segment is also red, except a broad black band at the apex; the other 

 segments (except the apical two) are reddish beneath. The second cubital cellule is 

 more than three times the length of the third, and on the lower side more than twice 

 the length of the third on the same side ; the third cubital cellule is twice as wide at 

 the bottom as at the top ; the first recurrent nervure is received almost in the middle 

 of the cellule, the second quite close to the apex. 



A. strenua, Cresson, is closely allied to this species, but is smaller, has the scutellum 

 channelled down the centre, the enclosed space on the metathorax without pubes- 

 cence, &c. 



