NO. 2261. NEW REARED PARASITIC HYMENOPTERA—GAHAN. 125 



median carina ; marginal vein equal to about twice the postmarginal 

 which is short and subequal to the stigmal; fore and hind femora 

 somewhat swollen, the latter pair not serrate beneath; hind tibiae 

 straight; abdomen of the female about equal in length to the head 

 and thorax combined, viewed from above ovate, slightly conic at apex, 

 the dor.sum slightly flattened, first and second tergites emarginate 

 medially at apex, ovipositor exserted one-fourth the length of abdo- 

 men ; abdomen of the male oval, flattened above, not longer than the 

 thorax. (See fig. 2.) 



Type of the genus — Pseuderimerus mayetiolae, new species. 



PSEUDERIMERUS MAYETIOLAE, new species. 



Female. — Length 1.8 mm. Head viewed from above approxi- 

 mately twice as broad as long, the posterior orbits narrow ; postocel- 

 lar line equal to twice the ocellocular, the latter line only a little 

 greater than the greatest diameter of a lateral ocellus; head and 

 thorax with fine, shallow, rugulose-punctate sculpture and covered 

 with short whitish pile; pleura more weakly sculptured than the 

 dorsum of thorax; propo- 

 deum laterally weakly 

 sculptured, medially dis- 

 tinctly rugose; wings hy- 

 aline, the area immediately 

 behind the marginal vein 

 very faintly tinged with 

 yellowish; abdomen above 

 and below finely, shallowly, fiq. 2.— pseuderimerus mayetiolae. antenna of a 

 aciculately sculptured. paratype female. 



Head and thorax aeneous, abdomen mostly black, tinged with brassy 

 in some lights ; antennae black, only the apex of club faintly brown- 

 ish ; coxae all aeneous, the legs otherwise entirely testaceous ; ovipos- 

 itor sheaths black. 



Male. — Length 1.5 mm. Differs from the female as follows: The 

 posterior orbits are much broader and not receding from the eye 

 margins, but extending back a distance about equal to the transverse 

 diameter of the eye before beginning to recede; the ocellocular and 

 postocellar lines are nearly equal, the former being several times as 

 long as the diameter of the rather small lateral ocellus ; the abdomen 

 is no longer than the thorax, sculptured as in the female, with a large 

 testaceous or yellowish patch medially both above and below. 



I'ype-locality. — Altamount, California. 



Type.— C^t. No. 21621, U.S.N.M. 



Host. — Mayetiola destructor Say on the authority of Mr. C. M. 

 Packard. 



Eight females and six males reared by Mr. Packard and recorded 

 in the Bureau of Entomology under Webster No. 13346. The type 



