ART. 4 NEW PARASITIC HYMENOPTERA GAHAN 3 



Female. — Length 2.3 mm. Head transverse, a little broader than 

 the thorax, about three times as wide as thick antero-posteriorly; 

 occiput rather strongly concave; ocelli in a low triangle, the post- 

 ocellar line longer than the ocellocular, the latter line equal to a little 

 more than twice the greatest diameter of an ocellus; viewed from in 

 front the head is a little broader than long; antennae inserted near 

 the middle of head, distinctly above the lower eye-margins; antennal 

 depression shallow; eyes bare; whole head with close reticulate-punc- 

 tate sculpture, the sculpture of face below antennae slightly finer than 

 that of frons; clypeus striate; antennal scape rather short; pedicel 

 shorter than first funicle joint; ring-joints distinct but strongly 

 transverse; first funicle joint a little longer than broad and very 

 slightly longer than the second, second and third equal, fourth to 

 sixth quadrate; club solid, weakly acuminate, slightly longer than 

 two preceding funicle joints combined ; thorax sculptured like the head ; 

 parapsidal grooves entirely effaced on posterior half of mesoscutum; 

 scutellum and axillae a little more finely and not quite so deeply 

 sculptured as mesoscutum; propodeum without a neck, more deeply 

 punctured than scutellum, without median carina and without lateral 

 folds, the spiracular sulci very faintly indicated but incomplete; 

 spiracles short-ovate and small ; wings ample ; submarginal vein much 

 longer than marginal; postmarginal and marginal equal; stigmal half 

 as long as postmarginal, the stigmal knob a little enlarged; abdomen 

 as long as thorax, and distinctly narrower, sub cylindrical, tapering 

 very slightly toward apex, first dorsal segment comprising a little 

 less than one-third the total length, following segments subequal or 

 successively increasing very slightly in length with the second seg- 

 ment the shortest; ovipositor concealed. Head and thorax dull 

 metallic green; abdomen shining black with a weak metallic sheen 

 in some lights; antennae dark brown above, the scape, pedicel and 

 funicle testaceous beneath and the club mostly testaceous; all coxae 

 and all femora concolorous with the thorax; distal ends of all femora, 

 the tibiae, and tarsi pale yellow, the apical joint of tarsi dark brown : 

 wings hyaline, venation pale brownish. 



Male. — Length 1 .8 mm. Antennal scape short, not more than three 

 times as long as broad; pedicel scarcely longer than broad; first funicle 

 joint about three times as long as pedicel and distinctly thicker than 

 pedicel; second funicle joint shorter than the first but approximately 

 twice as long as broad; following joints all longer than broad; club 

 only slightly thicker than funicle and subequal in length to two pre- 

 ceding joints; thorax and abdomen unusually slender; otherwise like 

 the female. 



Type locality. — Bird's Landing, California. 



Type.— C&t. No. 29439, U.S.N.M. 



Host. — Harmolita grande Riley. 



