500 



APIDiE. 



of the anteunse ; ocelli in a triangle on the vertex ; anteunae short, 



subclavate ; mandibles stout, triden- 

 tate ; labial palpi 4-3ointed, basal 

 two joints elongate, apical two 

 minute ; maxillary palpi G-jointed, 

 basal three joints subequal, apical 

 three gradually decreasing in length. 

 Thorax ovate ; fore wing ^ith the 

 radial cell rounded at apex, the 

 apex not approximate to the costal 

 margin ; three cubital cells, the 

 2ud forming a truu(;ated triangle, 

 the 2nd and 3rd cells each receiving 

 a recurrent nervure beyond the 

 middle ; legs short, fairly stout, des- 

 titute of polliniferous appendages. 

 Abdomen slightly narrowed at base. 

 Of the Indian species I have only- 

 observed the nests of C. perforatrix, 

 made in the hollow of a dead shoot 



of the branching bamboo {Pseudostaclnjum compactiflorum, Kurz), 



and of C. viridissima, Dall. Torr., tunnelled into the dead stems 



of the common castor-oil plant. 



Fig. 167. — Ceratina. 



1. Maxilla; 2. labium. (Much 



enlarged.) 



Key to the Species. 



A . Metallic green, bluish or bronzed green, with 



a few yellow markirigs. 



a. Abdomen entirely green. 



a'. Leng-th 8-10 mm C. viridissima, p. -501. 



b'. Length 4-5 mm C. iJropinqua, p. 501. 



b. Abdomen green, segments 4-6 with square 



velvety-black lateral spots C. sexmaculata, p. 501. 



c. Abdomen green, banded with yellow .... C. taprobance, p. 502. 



B. Head and thorax black, abdomen entirely 



ferruginous red C. picta, p. 502. 



C. Black, variegated with yellow. 



a. A X-shaped yellow macula on clypeus. 



a! . Basal three abdominal segments im- 

 maculate C. perforatrix, p. 502. 



b' . Abdominal segments 1-5 with a yellow 



transverse band C. Meroglyphica, p. 603. 



b. Clypeus entirely yellow. 



a'. Apical three abdominal segments black, 



immaculate C. moderata, p. 504. 



b'. Abdominal segments 1-5 with broad 



entire transverse yellow bands C. beata, p. 504. 



c. Clypeus with a transverse yellow line 



slightly broadened in the middle. 



a! , Space at base of median segment with 



wide reticulations C. lepido, p. 505. 



I'. Space at base of median segment mi- 

 nutely punctured C. simillima, p. 505. 



