12 Journal New York Entomological Society. iVoi. xix. 



DESCRIPTIONS OF THREE NEW NORTH AMERICAN 



SPECIES OF THE MYMARID GENUS POLYNEMA 



HALIDAY PARASITIC ON MEMBRACID EGGS, 



WITH A LIST OF THE SPECIES DESCRIBED 



SINCE THE YEAR 1898. 



By a. a. Girault, 

 Urbana, Illinois. 



The following isolated descriptions are published in order to 

 enable the names of the species to be used in forthcoming entomo- 

 logical publications and also to establish a species whose status has 

 been that of a iiouicii nudum. 



I. Polynema striaticorne, new species. 



Normal position. 



Female. — Length, 1.64 mm. ; comparatively robust and large. Normal in 

 size for the genus ; easily visible to the unaided eye. 



General color reddish brown to blackish, including the coxaj, femora and 

 tibiffi ; scape, pedicel, three proximal tarsal joints, base and apex of the tibiae, 

 base of the femora and the trochanters honey yellow and also the abdominal 

 petiole ; first funicle joint with some yellowish ; distal six joints of the antennae 

 and distal tarsal joint dusky black; venation yellowish brown, the marginal vein 

 longer than wide but normal for the genus, darker. Wings hyaline. Color 

 variable. 



Fore wings moderately densely ciliate in the disk, the discal cilia moder- 

 ately fine and strong, about twenty longitudinal lines across the widest portion 

 of the wing; the marginal cilia beyond the distal half of the wing long, about 

 five eighths the length of the greatest width of the wing, the apex of the wing 

 regularly rounded, its greatest width at about the distal fourth ; long, gracefuU 

 Marginal cilia of the posterior wing (caudal margin) more than twice longer 

 than the wing is wide, at least twice the size of the cilia of the cephalic margin, 

 the disk of the wing with no cilia excepting along each margin : along the 

 cephalic margin, excluding the marginal cilia, there is a double or paired line 

 running the length of the distal two thirds of the wing, along with the mar- 

 ginal cilia, but gradually disappearing proximad, beyond the marginal cilia and 

 before attaining the venation; along the caudal margin the outer (caudal) line 

 does not appear until the distal third of the wing is reached and proximad the 

 other line begins to disappear sooner than the marginal cilia. Abdomen conic- 

 ovate to conical, about equal to the combined length of the head and thorax or 

 somewhat longer, the ovipositor barely exserted. Marginal vein with two dis- 

 tinct notches in its cephalic margin. 



Vertex delicately reticulated, face nearly polished. Scutellum with the 



