hymenoptera. 221 



58. Ammophila gracilis. 



Ammophila gracilis, St. Farg. Hym. iii. 381. 21. 

 Hab. Mexico. 



59. Ammophila atriceps. B.M. 



Female. Length 8 lines. — Black : head coarsely punctured ; 

 the anterior margin of the clypeus rounded ; the face and cheeks 

 have a long thin black pubescence, a few black hairs also on the 

 vertex. Thorax coarsely punctured, and having a long thin gri- 

 seous pubescence ; the enclosed portion of the metathorax rugose 

 at the base and rugose-striate at the apex ; wings fusco-hyaline, 

 the nervures black. Abdomen ferruginous ; the petiole, the api- 

 cal half of the fourth segment, and the fifth and sixth, black. 



Male. — This sex has the head clothed vvith black pubescence 

 and the face silvery ; the clypeus slightly produced, its anterior 

 margin roiuided ; the thorax is closely punctured ; the abdomen 

 as in the female. 



Hab. Mexico. 



60. Ammophila breviceps. B.M. 



Female. Length 8 lines. — Black : the face densely covered 

 with silvery pile ; the vertex smooth ; the sides of the thorax 

 clothed with silvery pile, the disk and mesothorax thinly covered 

 with pile, the latter transversely striated ; the mesothorax punc- 

 tured and having a central longitudinal impressed line ; the 

 wings hyaline and iridescent, their apical margins faintly clouded ; 

 the nervures rufo-testaceous, the tegute and legs ferruginous ; 

 the coxse and base of the femora black ; the posterior tibia; 

 slightly fuscous towards their apex. Abdomen red ; the first 

 joint of the petiole black, the second more or less fuscous above ; 

 the first segment of the abdomen has an elongate fuscous stripe 

 above, the third a small spot at its basal margin, the fourth is 

 black except a narrow apical border, and the extreme apex is 

 fuscous. 



Hab. Mexico. 



Only a single specimen of this species is in the Collection : it 

 is most probable that a series would exhibit great variety in the 

 markings on the abdomen : in general appearance it closely re- 

 sembles A. nasuta, but the clypeus is not produced. 



Gl. Ammophila placida. B.M. 



Male. Length 9 lines. — Black : the face and cheeks have a 

 long thin black pubescence. The prothorax smooth ; the meso- 



