180 H. L. VIERECK. 



middle ocellus, below this keel is continued nearly half way down the clypeus as 

 a raised line. Eyes nearly parallel, the space between on a line drawn across the 

 middle of the clypeus less than the space between on a line drawn across the front 

 anterior to the middle ocellus. Clypeus convex, with a narrow polished margin. 

 Labrum concave, the punctures coarse close together but not well defined; 

 sparsely covered with bristles, more copiously with short soft hairs. Mandibles 

 curved, the tip of one extending almost as far as its fellow. Scape about as long 

 as the first three joints of flagellum combined, hardly thicker than the flagellum. 



Thorax. — Sculpture of dorsum largely hidden by the abundant pale dull yel- 

 lowish pubescence, the exposed portions closely indistinctly punctured, granular. 

 Scutellum with a stout spine on each side directed backward, the spine as long as 

 the pubescence, about one mm. Metathorax on the posterior aspect sparsely 

 covered with black hairs, indistinctly punctured and dullish except for a trian- 

 gular area which is depressed along the middle, rugulose near its base in greater 

 part smooth and shining ; the apex of this triangular area is about two-thirds the 

 distance from the superior margin of the posterior aspect of the metathorax, from 

 this apex to the insertion of the abdomen is a narrow sulcus. Sides of the thorax 

 thickly clothed with black pubescence, the sculpture like that outside of the tri- 

 angle on the metathorax. Legs in greater part covered with short black hairs; 

 tarsal claws cleft the parallel tooth extending nearly to the middle of the long 

 claws. Wings hyaline darkened with brown but not strongly, nervures black or 

 almost; first recurrent nervure received by the second submarginal cell a little 

 beyond the middle, the second recurrent received by the third submarginal cell 

 at the middle or nearly; transverse median nervure in posterior wings origina- 

 ting some distance before the origin of the cubitus. 



Abdomen with minute indistinct punctures separated by small spaces; some 

 bristle like hairs at base, sides and on the margins of slight depressions on the 

 segments, otherwise covered with a fine appressed dark (black) pubescence which 

 almost hides the character of the sculpture and has brown, purple and bluish re- 

 flections in certain lights, the rich deep royal blue predominating. Pygidial area 

 with slightly raised margins, finely granular, dullish 



Jet Black excepting antennae, mandibles and legs which have a more or less 

 brownish tendency. 



Type, Coll. Am. Ent. Soc. Type locality, California. 

 May be the $ of B. edwardsii Cress. 



ISoinboiiieleela arizoni<-a Ckll. 



Type loaned to Acad. Nat. Sci. Phila. Type locality, Tempe, 

 Arizona. 



Tempe, Arizona, March, at flowers of Sphceralcea variabilis 



Bombomelecta larrere Ckll. 



Can. Ent. Lond. Out., Dec, 1900, p. 361, 9, 12.5 mm. 



Type loaned t<> Acad. Nat. Sci. Phila. Type locality, Mesilla 

 Park, N. M. 



Mesilla Park, N. M., 9, v, 1900, at flowers of Larrea tridentata 

 (Ckll.) 



