ART. 18, BEES IN THE NATIONAL. MUSEUM COCKERELL. 19 



The female sometimes has a light median spot on the upper part of 

 the clypeus. 



PERDITA DINOGNATHA, new species. 



Male. — Length about or nearly 5 mm. ; very broad ; head extremely 

 broad, dull dark olive-green, orbits diverging below ; pubescence on 

 head and thorax dull white, thin and rather short, but distinct; 

 mandibles very long and curved, simple, rufo-testaceous, with dark 

 apex ; labrum pale ; clypeus broad and low, forming an arched band, 

 entirely pale reddish-testaceous; a minute transverse mark beneath 

 each eye, but no other lateral marks; no dog-ear or supraclypeal 

 marks, but a faint pale supraclypeal shade ; cheeks simple ; antennae 

 black; thorax black, with the metathorax dark blue; mesothorax 

 dull; tegulae testaceous; wings millcy hyaline; stigma narrow-lanceo- 

 late, pale yellowish-testaceous, nervures very pale; legs black, the 

 tarsi becoming reddish, anterior tibiae pallid in front ; abdomen very 

 broad, shining dark reddish-brown, without markings. 



San Diego County, California, April (Coquillett). 



Type.— Cvit. No. 24895, U.S.N.M. 



In my key runs to 52, but runs out on account of the lack of lateral 

 face marks. The stigma recalls that of P. latior. The abdomen is 

 redder than that of P. grandiceps Cockerell. 



PERDITA HAPLUKA, new species. 



Female. — Length about 5 mm., robust, with broad abdomen; pleura 

 with much white hair, but mesothorax nearly bare ; head transverse, 

 but not remarkably broad, orbits converging below; color of head 

 dark bluish-green, most evident on front, which is shining but not 

 polished; no face markings, clypeus and supraclypeal region black; 

 mandibles with a conspicuous red subapical spot; scape black, reddish 

 at extreme base; mesothorax dullish, black, anteriorly strongly 

 brass}'; pleura, scutellum and postscutellum black, but metathorax 

 steel-blue or slightly greenish-blue ; tegulae testaceous ; wings milky- 

 hyaline, stigma and nervures reddish-white ; stigma lanceolate, mar- 

 ginal cell very oblique at apex ; legs black, anterior knees dark red- 

 dish ; abdomen dullish black, faintly aeneous at bases of segments, 

 hind margins of segments colorless. 



Sanderson, Texas, May 9, 1912 (J. S. Mitchell). 



Type.—Q^t. No. 24896, U.S.N.M. 



Evidently related to P. texana (Cresson), but separable b}' the 

 metallic colors on head and thorax. The male probablj' has a rufous 

 abdomen. 



PERDITA LUCIAE Cockerell. 



Male. — Tacna, Arizona (H. G. Hubbard). Named after Miss 

 Lucy Howard. 



