OF WASHINGTON. 69 



preceding funicle joints together. Pronotum prominent, well rounded, 

 posterior margin incised in the middle. Mesoscutum with well-marked 

 parapsidal furrows somewhat divergent anteriorly. Metanotum with 

 shallow median longitudinal sulcus. Abdomen petiolate, petiole nearly 

 as long as hind coxa; remainder of abdomen shorter than thorax, 



FIG. ii. Cosmocomoidea morrilli: Antenna of female. 



narrow ovate. Forewings slender but well-rounded; submarginal vein 

 extending for a little more than a third of the wing length and ending 

 in a rounded knob ; hind wings excessively narrow. 



Male. Antennae n -jointed, all joints appearing flattened, subequal 

 in length, terminal joint shortest; all joints well separated and longer 

 than broad; scape short, only slightly longer than pedicel, rounded on 

 anterior border; pedicel with rounded margins. 



The genus resembles in many respects Polynema Hal. 

 (=Cosmocoma F6rst.),but differs in the n-jointed antennae 

 of the female and in other respects. It derives its name, how- 

 ever, from the general resemblance. 



COSMOCOMOIDEA MORRILLI, n. sp. 



Female. Length, 1.4 mm. Expanse, 3.9 mm. Greatest width of 

 fore wings, 0.4 mm. Greatest width of hind wings. 0.06 mm. 



General surface of body smooth, shining; mesoscutellum faintly 

 aciculate-punctate ; general color very light brown, almost light yellow- 

 ish clay color; eyes black; ocelli reddish; a transverse black band across 

 the hinder portion of the mesoscutum; metascutum dusk}-; abdomen 

 with two transverse dusky bands at base and near middle. Pronotum 

 edged with brownish ; antennae black, except 5th and 6th segments of 

 funicle which are silvery white, and the scape and pedicel which are 

 honey-yellow. Tarsi and tibiae dark, the remainder of the legs con- 

 colorous with body; wings hyaline except for faint dusky patch beyond 

 stigma. These colors are darker in some individuals. 



Male. Measurements about the same. Antennae black. Body en- 

 tirely black, shining. All femora and coxae black; tibiae and tarsi 

 brownish. Wings perfectly hyaline. 



Type. Xo. 11856, U. S. National Museum. Described 

 from I male and 6 female specimens reared by Dr. A. YV. 

 Merrill at Orlando, Fla., March 29. 1907, from the eggs of 

 what is apparently a homopterous insect. According to Doc- 

 tor Merrill's notes, the eggs of the host insect seem to be de- 



