19 



cilia of front wing about one-third to one-fifth as long as the 

 greatest width of the wing, apparently longer in the male than 

 in the female. Scutellum with a pair of black bristles widely 

 separated and a pair of stronger ones posterior and interior to 

 these, but far in advance of the hind margain. Scnlptnre ex- 

 tremely fine and indistinct. Length .6 — .75 mm. 



In life the dark parts of the insect are no doubt black, the 

 pale joarts orange or j^ellow. 



Hab, Mexico, Cuantla, Morelos; from Jassid eggs in cane. 

 (Koebele). 



Pentarthron fasciatum sp. nov. 



Flavescent, more or less orange in balsam, the apical seg- 

 uieuts and especially those immediately before the apex of the 

 abdomen blackish, so as to form a wide transverse dark band. 

 Wings clear hyaline, but with a large and conspicuous dark 

 basal area, extending across the wing to the tip of the stigmal 

 vein. In general structure, antennae, etc., this species is like 

 P. flavuin of Hawaii, but the hairy clothing of the wings is 

 somewhat different. It is not yet certain, whether P. flavum 

 is identical with Trichogramma pretiosa. In P. fJavuni and 

 fasciatum alike, there are six hairlines in the field of the wing 

 from the costa to the line which Hses at the apex of the stigmal 

 vein, this line being the sixth. In P. flavum. between the fourth 

 and fifth hair line there are many additional hairs, iu P. faffci- 

 atum. at most five or six and even only two or three. The hair- 

 lines between the one jiroceeding from the apex of the stigmal 

 vein and the dorsal margin are mostly very clear and distinct 

 in fasciatum; whereas in flavum. there are many irreiinlar hairs 

 between some of the lines. P. fasciatum. has in all about 13 

 distinct hair lines on the broad part of the wing toward the apex. 

 The hind wings are smoky basally and have a complete row 

 of discal cilia from the stigmal region to the apex, nearer the 

 costal margin than the dorsal, at least on the apical portion of 

 the wing. Length .5 mm. 



Hab. I'lexicp, Orizaba, Vera Cruz, from eggs of Diatraea 

 saccharalis, Dec. 11th, 1907 (Koebele). 



