186 HTMENOPTEEA. 



2. Pompilus (Planiceps) concolor. 



Planiceps concolor, Smith, Journ. Ent. i. p. 80 l ; Cresson, Trans. Am. Ent. Soc. i. p. 137*. 



Hab. Mexico 1 . 



This species can hardly be synonymous with P. pulchritarsis : it is only 5 lines in 

 length ; is deep blue, with brilliant reflections ; the abdomen is iridescent ; the posterior 

 wings are pale fusco-hyaline ; the anterior tarsi are rufo-testaceous. 



^ 3. Pompilus (Planiceps) notabHis. 



Planiceps notabilis, Smith, Journ. Ent. i. p. 80 l ; Cresson, Trans. Am. Ent. Soc. i. p. 137 a . 



Hab. Mexico 1 . 



We have received a specimen from Vera Cruz (H. H. Smith) apparently belonging 

 to this species. It has the clypeus broadly rounded at the apex, the eyes converging 

 beneath, the hinder ocelli separated from each other by a somewhat greater distance 

 than they are from the eyes, the first recurrent nervure received in the middle of the 

 cellule, the second a little beyond the middle of the second transverse cubital nervure. 



The following six species agree with the foregoing in having an elongated prothorax 

 and somewhat flattened head ; but they have not the fore tibiae flattened and dilated, 

 and have three cubital cellules. (Species 4-9.) 



v j 4. Pompilus telemon. 



Cffiruleus ; alis fuliginosis. 

 Long, fere 18 millim. 



Hab. Guatemala, San Geronimo (Champion). 



Blue, with purplish tints. Head semi-opaque, more shining over the antennae, 

 velvety, sparsely covered with longish black hairs ; the eyes slightly converging 

 beneath ; the hinder ocelli separated from the eyes by a greater distance than they are 

 from each other ; a broad shallow channel runs from them to the eyes ; apex of the 

 clypeus transverse. Antennae black, short, stout ; the third joint longer than the fourth. 

 Prothorax fully one half longer than the head, rounded and narrowed in front, slightly 

 rounded at the apex inwardly. Scutellum much narrowed towards the apex. Median 

 segment at the apex oblique and sharply truncated ; in the middle transversely and 

 coarsely striated ; concave at the apex. Abdomen as long as the thorax and narrower 

 than it, compressed ; the pygidium bearing longish black hairs. The first and third 

 transverse cubital nervures curved, somewhat roundly elbowed, the second straight ; 

 the second cubital cellule at the top and bottom a little longer than the third ; the first 

 recurrent nervure received nearly in the middle of the cellule, the second distinctly 



