20 HYMENOPTEKA. 



variety of A. brevicejps. The latter is smaller (8 lines as against 9J), and has the meso- 

 thorax transversely striated (unless Smith, as is likely, has written mesothorax for 

 metathorax; for he mentions inter alia that the mesothorax is punctured, and no 

 mention is made of the metathorax at all). 



II. Petiole composed of only one joint. (Species 29-37.) 



f^a^'- 1 J 29. Ammophila montana. (Tab. I. fig. 2, s .) 



^ Nigra, capite et thorace dense fusco-pilosis ; clypeo et facie argenteo-pilosis ; abdominis segmentis 1° et 2° 



lateribus runs ; clypeis apice truncato ; alis fere hyalinis, apice fumatis. $ . 

 Long. 20 millim. 



Hah. Mexico, Ventanas in Durango 4000 feet (Forrer). 



The hair on the head is longer than on the thorax, but is hardly so dense ; the 

 silvery pile on the face and clypeus is close, on the sides of the front it is sparser ; the 

 punctuation is sparse, but strong. Third antennal joint a little longer than the fourth. 

 Thorax strongly punctured ; metathorax opaque, rugosely punctured ; scutellum punc- 

 tured, a broad and deep depression at its base ; the lateral and central furrows on the 

 mesonotum shallow, not very distinct. Petiole curved, twice the length of the hind 

 coxae, the basal half sparsely punctured and haired. Legs pruinose, the coxae punctured 

 and covered with long pale hair. 



v/ 30. Ammophila jason. (Tab. II. fig. l, ? .) 



Nigra, punctata, dense nigro-pilosa ; abdomine rufo ; clypeo sinuato ; alis fuliginosis. $ . 

 Long. 21 millim. 



Hah. Guatemala, San Geronimo (Champion). 



Head broad, almost shining, closely and strongly punctured ; clypeus broadly 

 projecting in the middle, the projection sinuated. Third antennal joint more than 

 twice the length of the fourth. Thorax strongly punctured; metanotum opaque, 

 transversely rugose ; metapleurae obliquely rugosely punctured, running into reticula- 

 tions ; sides of the prothorax strongly striolated ; scutellum punctured, except in the 

 centre, behind with some striolations ; mesonotum broadly depressed laterally and in 

 the middle; pronotum depressed in the centre. Petiole curved, nearly twice the 

 length of the hind coxae, punctured, and bearing some rather long hair at the base. 

 Hind coxae strongly punctured, sparsely covered with longish hair ; anterior coxae less 

 strongly punctured, and with some coarse striolations on the lateral hollow ; trochanters 

 and femora with scattered hair ; tibiae sparsely, the tarsi thickly, spined. Wings with a 

 violet tinge ; third cubital cellule oblique, slightly narrowed at the top ; first recurrent 

 nervure recurved very shortly before the middle of the cellule. 



