NO, 2045. NORTH AMERICAN BEES— COCKERELL. 91 



Genus DIANTHIDIUM Cockerell. 



A very widespread genus, rather more so than Anthidium, since there is one species 

 in Australia. 



The females use resin in making their nests, and are called by Fab re "Resiniers. " 

 Pulvilli are present on the feet of this genus, but absent in true Anthidium. 



Subgenera and Sections. 



Paranthidium T. and W. Cockerell, 1901. 



Type. — Perpictum Cockerell. 

 Anthidiellum Cockerell, 1904. 



Type. — Strigatum Panzer (European). 



Tables. 



(1) Cockerell, Bull. Southern California Acad. Sci., vol. 3, 1904, pp. 3-4. 



(2) Friese, Das Tierreich, Lief. 28, Megacliilinae, 1911, pp. 379-381. 



(3) Friese, Das Tierreich, Lief. 28, Megachilinte, 1911, pp. 391-392. 



(4) Swenk, University [of Nebraska] Studies, vol. 14, No. 1, 1913, pt. 25-6. 

 agnatum Cresson, 1878. Mexico (Sumichrast). Tab. 3. 



Wings fuliginous. 

 apicale Cresson, 1878. Mexico (Sumichrast). Tab. 3. 



This, bivittatum and toltecum "are closely related, and have a short, broad, robust 

 form somewhat like that of perplexum and notatum" (Cresson). 

 balli Titus, 1902. Ridgeway, Colorado, July 31 (E. D. Ball). 



Length 14 mm., markings dark rich yellow; allied to venustum. 

 *bivittatum Cresson, 1878. Mexico (Sumichrast). Tab. 3. 



Mesothorax with two yellow stripes. 



Guatemala (Barber and Schwarz). Female described; Ann. Mag. Nat. Hist., July, 

 1913, p. 108. 

 boreale Robertson, 1902. Near Carlinville, Illinois (Robertson). 



Allied to D. notatum; male 8 mm.; legs red, marked with yellow. 



Characters: Trans. Amer. Ent. Soc, vol. 29, p. 175. 

 *concinnum Cresson, 1872. Texas (Belfrage). Tab. 2. 



"Much like simile, differing principally by the color of the legs. " (Cresson.) 



The legs are fulvo-ferruginous. 



Cotype.— Cat. No. 1773, U.S.N. M. 

 *conslin.ile Ashmead, 189G. Near Lcs Angeles, California (Davidson). Tab. 1. 



Female 7 mm. 



Parasite; Torymus anlMdii kshmend. 



The nest is figured and described in Ent. News, 1896, p. 23. 



Type.— Cat. No. 1GG98, U.S.N.M. 

 cressonii Dalla Torre, 1896. Tab. 2. 



New name for venustum Cresson, preoccupied. 



Nest: Bull. Amer. Mus. Nat. Hist., vol. 12, (1906), p. 444, fig. 1. 

 curvatum Smith, 1854. Georgia. Tab. 1. 



Tliis has been confused with sayi {interruptum Say). 

 *davidsoni Cockerell, 1904. Bear Valley, California (Davidson). Tab. 1. 



Allied to parvum. 



Type.—Cat. No. 9653, U.S.N.M. 

 *ehrhorni Cockerell, 1900. Mojave Desert, California (Ehrhorn). Tab. ]. 



Belongs to subgenus Anthidiellum. 



Type.— Cat. No. 5811, U.S.N.M. 

 *eiseni Cockerell, 1913. San Jose del Cabo, Lower California (Eisen). Belongs to 

 Anthidiellum. 



Type.—C3it. No. 16225, U.S.N.M. 



