15 



Closterocerus Westwood. 



I assign to this genus a minute species of brilliant metallic 

 color, which in some respects differs in its characters from those 

 given by Ashmead, who was acquainted with a number of species 

 of the genus. The penultimate and antepenultimate antennal 

 joints are not transverse. 



Closieroccrus javanus sp. nov. 



Metallic blue and green, in balsam becoming ]iiceous, and 

 less brightly metallic. Legs pale yellow (at least in the female) 

 the coxae all dark, the hind femora also conspicuously dark, the 

 tips being pallid. Pedicel of antennae notably dark by reflected 

 light, the following joints paler. 



Antennae of female eight-jointed with the ring joint, the 

 latter sometimes hardly distinguishable, except after treatment 

 with potash. The pedicel is large and elongate, longer than the 

 ring-joint and tw^o following joints together; the fourth anten- 

 nal joint (counting the ring joint) is about as long as wide, 

 and smaller than the next following, the sixth is longer than 

 its greatest width, the seventh still more elongate, while the 

 eighth without including its spinose prolongation is as long as, 

 or longer than the seventh, and with this prolongation not much 

 less than twice as long. 



The antenna of the male is almost like that of the female, 

 but the fourth and eighth joints appear rather longer, the latter 

 with its apical prolongation being a little longer than the two 

 preceding together., In both sexes the flagellar joints are 

 clothed with long hairs, longer than the joints bearing them. 

 They also bear sparse short spinose or scale like processes, the 

 longest of which is situated at the base of the spinose prolonga- 

 tion of the apical joint. 



Thorax with conspicuous microscopical reticulation, the sur- 

 face shining. Wings not very densely hairy, the clothing ter- 

 minating basally in an angle before the base of the marginal 

 vein ; longest marginal cilia in length about one-third the great- 

 est width of the wing ; submarginal vein shorter than the mar- 

 ginal; stigmal longer than the post marginal, a distinct round- 

 ish smoky spot occupying the middle of the wing from costal 

 to dorsal margin and including the stigmal vein; the latter 



