12 CALIFORNIA ACADEMY OF SCIENCES. 



however, the wings of nitbilipennis are sometimes hyahne, 

 so too much reliance must not be placed on that charac- 

 ter. The greater length of the antennce and longer tarsal 

 comb will help in separating the females, while the form 

 of armature on ventral segments two and six will dis- 

 tinguish the males. 



Bembex Luc^ Cress. El Paraiso and San Borgia, L. 

 Cal. {Haines). May. This species seems to be unde- 

 scribed, the name Lucce being a manuscript one. 



Gorytes eximius Prov. One female. El Paraiso, L. 

 Cal. {Haines). May. 



MASARID.^. 



Masaris maculifrons n. sp. 



? . — Head and thorax with coarse, close punctures, 

 having the appearance of being granulated, the punctures 

 most distinct on the prothorax above and on the dorsulum 

 anteriorly; abdomen with exceedingly fine and close 

 punctures; marginal cell truncate at tip; deep black, sub- 

 opaque; a large semi-oval spot on clypeus at base (the 

 sides of the spot are emarginate), a pyriform spot just 

 above the insertion of antennae, a spot in the eye emargin- 

 ation, posterior orbits narrowly, an oblique elongate mark 

 on each shoulder, posterior margin of pronotum, outer 

 margin of tegula?, large spot on mesopleura?. spot at 

 apex of scutellum, and the angles of the metathorax 

 whitish ; abdominal segments 1-5 above with their apical 

 margins whitish, that on the first, second and third seg- 

 ments interrupted on each side of the middle, so that it 

 represents three separate marks or spots, the laterals of 

 which are largest, ventrall}' the second segment has a 

 small spot on each extreme side, the third with a medially 

 interrupted fascia at apex, and the fourth with four small 

 spots, all whitish: the head and thorax are clothed with 



