268 PROCEEDINOS OF THE NATIONAL MUSEUM. vol. 43. 



atratula Dalla Torre, 1896. 



Same as atrata. 

 atrifera Cockerell, 1910. Mexico (Deppe). 



atrifera sandiarum Cockerell, 1910. Sandia Mountains, New Mexico (Z. R. Watson). 

 atrifrons Smith, 1854. North Carolina. Tab. 1. 



Name preoccupied: = carolinensis . 



* atripes Cresson, 1872. Texas (Belfrage). Tab. 1. 



atripes acomanche Cockerell, 1905. Fed or, Texas (Bii'kmann). 



autumnalis Robertson, 1905. Near Carlinville, Illinois (Robertson). Tab. 4. 



baileyi Cockerell, 1906. Fedor, Texas, April 5 (Birkmann). 



* bimaculata Lepeletier, 1825. Pennsylvania. Tab. 1, 4. 



Varieties a, b, c, Cockerell, Canadian Entomologist, July, 1905, p. 267. The species 

 goes west to Kansas, 

 binotata Say, 1837. Indiana. 



Same as bimaculata. 

 blakei Cockerell, 1905. Beulah, New Mexico (Cockerell). Tab. 1, 3. 



* boltonise Robertson, 1905. Near Carlinville, Illinois (Robertson). Tab. 4. 

 Falls Church, Virginia, August and September (N. Banks). Very like M. perplexa, 



but smaller; differs from M. illata by the smaller average size, band on middle 

 of second abdominal segment entire or almost, and tuft on end of hind femora pale. 

 bruesi Cockerell, 1906. Fedor, Texas, May 5 (Birkmann). Tab. 2. 



Allied to petalostemonis . 

 cajennensis Lepeletier, 1841. Cayenne. 



Also in the West Indies. 

 calif ornica Smith, 1879. California. 

 Name preoccupied :=smiiMi. 



* caliginosa Cresson, 1878. Georgia (Morrison, Ridings). Tab. 1. 

 carolinensis Dalla, Torre, 1896. Tab. 1. 



New name for Tetralonia atrifrons Smith, from North Carolina, 

 chrysothamni Cockerell, 1905. Embudo, New Mexico (Cockerell). Tab. 1, 3. 



Visits Chrysothamnus . 

 civica Cockerell, 1910. Mexico (Forrer). 



* cnici Robertson, 1901. Illinois. Tab. 1, 4. 

 colliciata Cockerell, 1910. Mexico (Deppe). 



* coloradensis Cresson, 1878. Colorado (Ridings, Morrison). Tab. 1, 4. 

 Ranges to Illinois (Robertson). 



* comanclie Cresson, 1872. Texas (Belfrage, Boll). Tab. 1. 

 Female resembles M. obliqua. 



* communis Cresson, 1878. "Georgia, Illinois." Tab. 1, 2. 

 comptoldes Robertson, 1897. Illinois (Robertson). Tab. 1, 4. 



* confusa Cresson, 1878. Colorado (Ridings, Morrison). Tab. 1. 

 Also in the mountains of New Mexico. 



* confusiformis Cockerell, 1906. Fedor, Texas (Bii-kmann). 



Resembles M. gilensis. Also occurs in Colorado; see Univ. of Colo. Studies, vol. 4, 

 1907, p. 255. 

 coreopsis Robertson, 1905. Near Carlinville, Illinois (Robertson). Tab. 4. 

 dagosa Cockerell, 1909. Grand Coulee, Washington, July 8. 



Resembles M. lupiiia and agilis, but male antennae much shorter, 

 denticulata Smith, 1854. "United States." 



* dentiventris Smith, 1854. Georgia. Tab. 1. 



* desponsa Smith, 1854. Ohio. Tab. 1. 



desponsiformls Cockerell, 1905. Corvallis, Oregon. Tab. 1, p. 89. 



