NORTH AMERICAN BEES. 



217 



though the face is buff instead of lemon-yellow, and there is 

 yellow on the hind border of prothorax. It might be taken for 

 modesta, but for its strongly punctured first abdominal segment, 

 the punctuation being closer than in typical citrinifrons. It is, 

 perhaps, a new species, but more evidence is needed before 

 describing it as such. 



All the other Texas specimens are females. They are rather 

 large, with the lateral marks constituting broad triangles as 

 in modesta, but quite long, rather as in floridana, yellow on hind 

 border of prothorax, on tubercles, and spots on tegulse; first 

 abdominal segment smooth. One differs by having all the light 

 markings pure white ; it is probably a variety. It hardly seems 

 likely that this is the female of citrinifrons, but I am not prepared 

 to describe it as new. 



New Mexico.— In the Mesilla Valley, 3800 ft., we find two 

 species: mesilla, allied to the eastern pygmaa; and asinina, 

 quite distinct from other U. S. species, and probably of Mexican 

 affinities. The female of asinina, described as bipes, was first 

 taken in September; it occurs on Solidago. This form has 

 yellow face-markings ; but in May, Miss Jessie Casad took 

 specimens on mesquite (Prosopis) which were somewhat larger, 

 and had the markings so pale as to be practically white. 

 P. mesilla, described from specimens taken in August, also 

 occurs in spring, as early as April, on Sisymbrium, &c. On 

 June 30th I took mesillce at Albuquerque. A female taken on 

 Salix at Santa Fe, July, appears to be pygmcea, agreeing with 

 the Colorado females so referred. It has not the light clypeal 

 spot of mesillce, and the lateral marks are smaller. P. rudbeckice 

 was originally described from Sta. Fe. On a crucifer on Tuerto 

 Mtn. near Sta. Fe, at 8550 ft., August 7th, I took a female 

 differing from any seen at Sta. Fe (7000 ft.), and quite similar 

 to varifrons female, except for the strongly and closely punctured 

 first abdominal segment. The tegulae have a light spot. This 

 is clearly distinct from any female Prosapis described, but I will 

 not propose a name for it, as it probably belongs to one of the 

 described males. 



On Monarda fistulosa at Monument Rock, Sta. Fe Canon, 

 8000 ft., August 11th, I took a female varifrons. It has the 

 wings rather darker than usual, and so looks like the Florida 

 schwarzii. 



Prof. E. O. Wooton took a remarkable series of Prosapis on 

 Scrophidaria, Ruidoso Creek, 7500 ft. From the males of this 

 lot were described P. ivootoni, P. tridentula (also Colo.), and 

 P. rudbeckice race ruidosensis. The females are of two types — 

 one like varifrons, the other like modesta ; the former has, the 

 latter lacks, the spot on tegulse. In both the first segment of the 

 abdomen is smooth. I infer, but cannot assert, that the varifrons- 



entom. — sept. 1898. x 



