178 PROC. ENT. SOC. WASH., VOL. 20, NO. 8, NOV. 1918 



white, scanty; no apical hair-bands on abdomen, but bases of second and 

 following segments with white bands of tomentum, broad laterally, failing 

 in middle; flagellum ferruginous beneath; clypeus not produced, shining 

 and irregularly punctured; front closely punctured, but shining between 

 the punctures; mesothorax polished, distinctly but not very densely punc- 

 tured, the posterior half distinctly green; scutellum punctured, with two 

 smooth polished spaces; area of metathorax large, rather distinctly denned, 

 irregularly plicate; posterior truncation not sharply defined; tegulae clear 

 testaceous; wings very clear, nervures and stigma pale amber; legs black, 

 with the knees, tibiae at apex and tarsi ferruginous, the anterior basitarsi 

 dark, and the hind basitarsi with a dark cloud apically; abdomen broad, 

 shining, very finely punctured; extreme apex reddish. Microscopical char- 

 acters: front densely punctured, but the spaces between the punctures 

 polished; mesothorax polished, without any sculpture between the punc- 

 tures; area of metathorax with strongly wrinkled rugae, hind spur with 

 three strong spines. The green tint on the mesothorax may be hardly 

 appreciable. 



Kotal Malul, S. Persia, Feb. 1906, three (F. Benton). U. S. 

 National Museum. 



The following key separates the above species from thqse de- 

 scribed by Perez from the Persian Gulf: 



Metallic species with large head, related to H. cephalicus Morawitz; 



length 6 mm. (Mascate) omanicus Perez 



Head ordinary 1 



1. Dark green, with bronzy tints on head and thorax; length 7 mm. 



(Bahrein) arabs Perez 



General color black, with little or no green 2 



2. Larger, without green tints bentoni Ckll . 



Smaller, with greenish tints on mesothorax persicus Ckll. 



Halictus capitosus Smith 



Tlahualilo, Durango, Mexico, at peach flowers, March 9, 1904 

 (A. W. Morrill). 



Halictus morrilli sp. n. 



Female. Length about 8.5 mm., anterior wing 7.7 mm.; black, the 

 abdomen with broad bands of white tomentum at bases of second and fol- 

 lowing segments. Very closely resembles H. forbesii Rob., to which it 

 runs in Crawford's (1907) table, but the head is smaller, with the face nar- 

 rower; the wings are not at all yellowish; the second submarginal cell is 

 very broad, receiving the first recurrent nervure some distance before its 

 end; the scutellum is shorter, with the disc highly polished; and the hind 

 spur has numerous small broad rounded laminae, appearing nodulose or 

 obtusely serrate. From H. desertus Smith it is known by the shining meso- 



