o 



1865.] 45' 



subsessile, convex, sometimes with a faint bluish reflection. Length 5 

 lines; expanse of wings 8J lines. 



Four specimens. Allied to P. scelestus, but is smaller, more shin- 

 ing, wings paler, and the legs less spinose. 



5. Pompilus tenebrosus, n. sp. 



Deep black, shining, with a slight purplish reflection; anterior margin of 

 clypeus truncate; wings fuscous, third submarginal cell petiolated. 



Female. — Deep black, with a slight purplish reflection in certain 

 lights, shining, immaculate; anterior margin of the clypeus truncate; 

 antennae brown-black, sericeous; posterior margin of the prothorax 

 arcuate ; metathorax opaque, rounded. Wings fuscous, the apical mar- 

 gins darker, with a slight violet reflection ; marginal cell rather short, 

 acute at tip ; second submarginal cell oblique, the third petiolated. 

 Legs black, sericeous, spinose. Abdomen convex, shining, sessile or 

 subsessile. Length 5 lines ; expanse of wings 9 lines. 



Two specimens. Much like the preceding, but easily recognized by 

 the petiolated submarginal cell of the superior wings. 



ti. Pompilus arctus, n. sp. 



Black, elongate, slender; anterior margin of clypeus concave: wings slightly 

 fuliginous, darker on the apical margins. 



Female. — Body narrow, cylindrical, elougate, deep black, somewhat 

 shining, immaculate ; face with a slight cinereous pile ; anterior mar- 

 gin of the clypeus concave ; antennae long, thickened at base and gradu- 

 ally attenuated to the tip, black, subsericeous ; posterior margin of the 

 prothorax angulate ; metathorax rounded, slightly depressed on the 

 disk. Wings narrow, tinged with fuliginous, much darker on the apical 

 margin, with a rather strong violaceous reflection ; second submarginal 

 cell quadrate, the third much larger and narrowed towards the margi- 

 nal. Legs black, somewhat shining, scarcely spinose. Abdomen elon- 

 gate, cylindrical, nearly sessile, somewhat shining. Length 4 lines; 

 expanse of wings 62 lines. 



One specimen. Easily recognized by the narrow, cylindrical form; 

 belongs to the subgenus Agenia. 



7. Pompilus parvus, n. sp. 



Black, with a beautiful green and blue reflection ; anterior margin of clypeus 

 rounded ; wings blackish. 



Female. — Black, subopaque, immaculate ; head aud thorax with a 

 deep greenish reflection ; anterior margin of the clypeus broadly 

 rounded ; antennas deep black, subsericeous ; posterior margin of pro- 

 thorax slightly arcuate; metathorax abrupt behind, with a rather deep, 

 longitudinal, central line. Wings fuliginous, slightly violaceous, apical 

 margins darker, posterior wings subhyaline ; marginal cell obliquely 



