98 PEOCEEDINGS OF THE NATIONAL MUSEUM, vol. 63. 



The sculpture on the mesonotum is susceptible to variation. 

 Although usually entirely shagreened the mesonotum may be some- 

 times extensively polished posteriorly. 



64. PLATYGASTER ANTENNARIAE (Ashmead). 



Synopeas antennariae Ashmead, Bull. 45, U. S. Nat. Mus., 1893, p. 288. 

 Amblyaspis antennariae (Ashmead) Brues, Bull. 22, Conn. Geol. Nat. Hist. 

 Surv., 1916 (1917), p. 533. 



Female. — Length 1.4 mm. Head twice as wide as long, not emar- 

 ginate behind, the cheeks strongly convex, shagreened above; occiput 

 transversely aciculate; interooellar triangle very low, not distinctly 

 sculptured; space around lateral ocelli finely shagreened; frons not 

 distinctly sculptured above, sometimes with extremely faint acicula- 

 tions, diagonally aciculate below; antennae elongate and rather slen- 

 der; pedicel two and one-half times as long as wide, as wide as joint 

 six apically; Joint three longer than wide, half as long and half as 

 wide as the pedicel, two-thirds as long and very little narrower than 

 four; four and five subequal, one and one-half times as long as wide, 

 a little shorter than six; joints seven to nine as long and as \nde as 

 six, about twice as long as wide; ten a little wider and longer, twice 

 as long as wide, subacute apically, the sides rounded; thorax two- 

 thirds as wide as long, (lattened above, as wide as the head; pronotum 

 finely longitudinally aciculate below on the sides, above polished, 

 without sculpture ; mesonotum flattened finely shagreened on anterior 

 half , polished posteriorly ; notauli distinct on basal two-thirds, widely 

 separated, the median lobe broadly rounded posteriorly; scutellum 

 transverse, suboonvex, highly polished, narrowly margined laterally; 

 abdomen as long as the head and thorax united; first and second 

 tergites without pubescence; median area on first longer than wide; 

 lateral foveae on second striate, the striae extending very slightly 

 beyond their apices; interfpveal area with three short carinae, one 

 median; tergites be^^ond the second not sculptured, with a row of 

 hairs across each; wings hyaline, extending the length of the last seg- 

 ment past the apex of the abdomen. Amber-colored; antennae dark 

 brown; legs yellowish brown. 



Male. — Length 1 mm. Differs little from the female in general 

 structure and color; antennae elongate, all the joints longer than 

 wide; pedicel broad, t\v4oe as long as wide, as wide as any of the fla- 

 gellar joints except the second and last; third joint half as long as the 

 pedicel, a little over half as wide; fourth joint slightly wider apically 

 than the pedicel, much widened at the apex, one and one-fourth 

 times as long as wide, the proportions varying with different degrees 

 of shrinkage (usually one and one-half times as long as wide); 

 abdomen as long as the head and thorax united, long-ovate, as wide 



