494 Mr. T. D. A. Cockerell on new Species n/ Perdita. 



a level with the antennal sockets ; supraclypeal mark a trans- 

 verse band, more than twice as broad as long ; dog-ear marks 

 present, separated by an interval from the lateral marks. 

 Mesothorax very shiny, with scattered punctures, greenish 

 find hairy in front, otherwise black and nearly nude ; hind 

 margin of prothorax with an interrupted cream-coloured band ; 

 tubercles cream-coloured, with a dark spot; metathorax dark 

 bluish, contrasting with the black scutellum and postscu- 

 tellum ; tegulas hyaline, with a cream-coloured spot ; stigma 

 hyaline, with a brown margin; nervures brown; marginal 

 cell with the poststigmatal portion a little the longest ; second 

 submarginal large, narrowing rather more than half to mar- 

 ginal ; third discoidal very distinct ; legs brown-black, anterior 

 knees and anterior tibia? in front cream-colour ; abdomen 

 black, with straight pale yellow bands, more or less inter- 

 rupted in the middle, at the extreme bases of segments 2 to 4, 

 and two spots representing a rudimentary band on the fifth 

 segment. Ventral surface dark. 



Var. a. — Clypeus all black, except a minute mark at each 

 side adjacent to the lateral face-marks; fifth abdominal seg- 

 ment without spots. 



Var. b. — Clypeus black, with the lateral corners cream- 

 coloured ; dog-earmarks mere specks; the three abdominal 

 Lands reduced to inconspicuous widely separated pairs of 

 yellowish stripes. 



Bab. S. Jose' de Guaymas, Mexico, April 10, 1898 {L. 0. 

 Iloicard). Four specimens. 



Related to P. sexmaculata. In my table of Perdita in 

 Proc. Phil. Acad. 18£6, it comes close to P. eorclamans, from 

 which it is separated by many characters. The var. b approxi- 

 mates tQ tarda, but is not really related to that insect. 



Perdita Lucice, sp. n. 



£ . — Length about 4 millim. 



Bright lemon-yellow, with dark markings. Head ordinary, 

 cheeks unarmed ; face nude, entirely yellow except the black 

 dots representing the frontal foveas; cheeks yellow, sparsely 

 hairy ; vertex dark metallic green ; scape yellow, with a black 

 spot at the top behind ; flagellum yellow beneath and blackish 

 above ; prothorax and sides and under part of thorax entirely 

 yellow; mesothorax practically nude, very shining dark 

 metallic olive- green, with the lateral margins narrowly yellow, 

 and a yellow patch near the hind margin; scutellum yellow, 

 w ith the sides dark ; postscutellum similarly coloured ; meta- 

 thorax dark blue dorsally, yellow at sides ; tegular hyaline ; 

 stigma hyaline, with a sepia-brown margin ; nervures light 

 brown ; marginal cell obliquely truncate, with its substigmatal 

 portion a little the longest ; second submarginal narrowed 



