T. D. A. COCKEREl.L. 73 



EXTECH\IA Pattoii. 



Eiitechiiia grisellsi Ckll. and Porter. 



Rocky Ford and Denver, Colo. (S. A. Johnson). Mr. Johnson 

 took both sexes, and E. dakotensis, C. & P., is the female of griselln. 

 Wallace County, Kansas, 3,000 ft. (Snoiv, 839). 



C'Ei\TRIS Fahr. 



Centris mexicana Smith. 



Cnernavaca, Mexico, A.ug. 1898. (Colo. Agric. College). 



The neotropical species of Centris are wonderful bees, including 



such striking types as the following: 



Abdomen red {Bhodocentns Friese). 



Large species- • • montezuma Cress. 



Small species, .totoiiaoa Cress., fiilviventriiii Cress, and <leiiti|>es Sm. 



Abdomen with broad yellow (tegiimentary) bands (PfecUocentrrs Frie.'^ei. 



fasciata Sm. (f*a<<iciat<'lia Friese) and eisenii Fox. 

 (Friese puts morsel in this group, but its affinities are all with the nUidti 

 group of Melanocentris. 

 Abdomen blue or green, apex red {Ci/anoceiitris Friese i. 



hseniorrlioidalis Fabr. 

 Abdomen black, without light hair at base (Melanocentris Friese). 



sethiops (Jress. 



The subgeneric names given by Friese do not take into account 

 the earlier (1807 and 1810) names given by Klug. 



Dl,4DA!tiIA Patton. 



D. afflicta (Cress.), D. australis (Cress.) and D. enavata (Cress.) 

 all occur at Fedor, Texas {Birkmann). For a table to separate 

 the species of this genus, see American Naturalist, Oct., 1905. 



D. nitidifrons Ckll. — A $ collected by Dr. H. Skinner at Silver 

 Lake, Wasatch Mts., Utah, 8,600 ft., July 14, greatly extends the 

 range. This species is near D. afiicta, but much smaller, with very 

 narrow second s. m,, and hair ou inner side of basal joint of hind tarsi 

 red. When fresh the abdomen is quite hairy, and there is short black 

 hair at bases of segments 2 and 3. 



XENOGLOMiiiA Smith. 



Xenoglossa brevicornis (Cresson). 



Fedor, Texas, June 20, 1898 {Birhnann). 



TKANS. AM. ENT. SOC. XXXII. (10) .JANUARY, 1906. 



