V °l889."'] PROCEEDINGS OF THE NATIONAL MUSEUM. 447 



Pimpla euurae sp. nov. 



Female.— Length, G mm ; ovipositor, 4 mm . Head and thorax black, 

 polished ; metathorax and abdomen rufous, the mesopleurae obscurely 

 rufous. In one specimen the thorax is almost entirely rufous. Au- 

 tenme 21-jointed, slender, cylindrical, brown. Palpi and teguhe white. 

 Parapsidal grooves indicated anteriorly. Metathorax with two longi- 

 tudinal parallel cariure on disk. Legs honey -yellow, the posterior 

 tibiae whitish along the upper face. Abdomen rather coarsely puuct- 

 ured, rufous, the apical edges of segments obscured or blackish, first 

 segment broader than long, keeled, sheaths of ovipositor black, very 

 hairy. Wings hyaline, iridescent, the stigma and veius pale-brownish, 

 the areolet oblique, a parallelogram. The male is but 4 mm long, the 

 thorax wholly black, the abdomen smoother than in the female, the 

 punctures smaller and less deeply impressed, the abdominal segments 

 much longer, the first is one and one half times as long as wide. The 

 antenna? in this sex are 20-jointed, otherwise it agrees with the female. 



Habitat. — California. 



Described lrom two females and six males, reared September 9th, 

 1885, from Euura on Salix califomica. 



Pimpla lithocolletidis sp. nov. 



Male. — Length, 3 mm . Black, smooth, shining; the metathorax and 

 abdomen sparsely punctured. Antennas 18-jointed, brown, the two 

 basal joints black above. Metathorax longer than high, gradually 

 sloping off posteriorly, punctate, the disk with two indistinct longi- 

 tudinal keels. Legs brown, the coxae and posterior femora black, the 

 base and tips of posterior tibia 1 and terminal joints of tarsi, dusky. 

 Wings hyaline, iridescent ; stigma and veins brown, areolet oblique, 

 narrowed at apex, the second recurrent nervure interstitial with the 

 outer nervure of the areolet. 



Habitat. — Alameda, Cal. 



Described from a single specimen received from Mr. Albert Koebele, 

 aud reared from a Tineid, Lithoeolletis sp., found on Grindelia robusta. 

 This species is the smallest species known. 



POLYSPHINCTA Grav. 



Polysphincta rufigaster, sp. nov. 



Female. — Length, 7 lum ; ovipositor, 2.5 mm . Black, shining; lower por- 

 tion of mesopleurae, mesopectus, metathorax, except the basal two- 

 thirds of the disk, and abdomen, except the two terminal segments, 

 rufous. Antennae brown above, yellow beneath. Palpi aud tegulae, 

 yellowish-white. Parapsidal grooves indicated anteriorly. Metathorax 

 quadrate, the apex emarginately grooved near the posterior lateral an- 

 gles, leaving the angles obtusely prominent. Legs reddish-yellow, the 



