560 Mr. T. D. A. Cockerell — Descriptions and 



at base. Wings smoky translucent, not reddened ; stigma 

 and nervures dark reddish. Legs black, anterior femora 

 dark blue beliind ; middle and liind femora obtusely angled 

 below ; spurs dark reddish ; hair on inner side of tarsi light 

 ferruginous ; trochanters with a yellow apical band ; ante- 

 rior tibiae with a small yellow streak. Abdomen bronzy 

 black and yellow-green, the apical part bright golden green; 

 first segment punctured in middle of disc and narrowly along 

 hind margin ; second segment more closely and finely punc- 

 tured than third ; seventh segment broad, shaped much as in 

 C. mexicana, but the apical angle much less acute and the 

 sides on each side of it much less concave ; sixth ventral 

 segment deeply excavated in middle, but not spined ; the 

 seventh dorsal has a little tuft of yellow hair at apex and 

 one at each corner, these contrasting with the white hair of 

 the ventral surface. 



Hub. Gualan, Guatemala, Feb. 18, 1912 {W. P. Cockerell). 



In the table by H. S. Smith (Trans. Amer. Ent. Soc. 

 xxxiii. p. 116) this runs to C. mexicana, Cressou, to which it 

 is evidently allied, but it differs in colour (e. g., me.vicana has 

 the face marks "white or yellowish,^' the flagellum pale 

 brown beneath, &c.) and in the structure of the apex of the 

 abdomen. 



Ceratina xanthostoma rufpennis, var. n. 



(^ . — Length about 8 mm. 



Wings deeply stained with red ; sides of face yellowish 

 green ; lateral and hind margins of mcsothorax green ; 

 scutellum suffused with crimson anteriorly; area of meta- 

 thorax less distinctly defined, A^ery narrow (short) at sides, 

 suffused with blue, the median part distinctly tricarinate ; 

 pleura a brilliant stecl-l)liie, purplish in middle and green 

 just bdow wings; a small yellow spot at base of anterior 

 tibijc, but the stripe evanescent. Neither in this nor in 

 typical xanthostoma is there any sign of the pale line on 

 lower anterior orbits found in male mexicana. 



Hah. Gualan, Guatemala, Feb. 18, 1912 {W. P. Cockerell). 



This looks like a distinct species, but I believe it is only a 

 variety of C. xanthostoma. 



DiantJiidium ffualanense, sp. n, 



(^ . — Length about 5 mm. 



Black, w ith very large strong punctures ; face, pleura, &e. 

 with scanty white hair ; clypeus (except nari'ow apical 

 margin) and lateral face-marks extending along eyes to 



