V °I889 n '] PROCEEDINGS OF THE NATIONAL MUSEUM. 445 



PIMPLA Fabr. 

 Pimpla yukonensis sp. nov. 



Female. — Length, 9 mm . Robust, subopaque, black; bead and thorax 

 finely alutaceous with an exceedingly fine punctuation ; abdomen finely 

 transversely aciculated, the apical segments smoother. Antennae 

 black, joints 8 and 9 yellowish. Palpi brown. Tegulae yellowish- 

 white. Metatborax quadrate, rouudedly truncate behind, with a trans- 

 verse keel. Legs rufous, tips of femora dusky, middle tibia? and tarsi 

 obfuscated ; posterior tibiae and tarsi black ; the anterior tibiae are 

 short, the basal third strongly constricted. Abdomen shaped as in P. 

 pedalis, the apical edges of segments narrowly white, the ovipositor 

 being about as long as the posterior tibiae. Wings hyaline; stigma 

 and veins black or brown black, the areolet quadrate, the second recur- 

 rent nervine joining it at the middle. 



Habitat. — Fort Yukon, Alaska. 



Described from one specimen taken by Mr. L. M. Turner in 1877. 



Pimpla pterophori sp. nov. 



Female. — Length, 9.4 mm ; ovipositor, 4 min . Black, smooth, shining; 

 the abdomen with coarse punctures, the apical margins of segments 

 smooth. Antennae black, becoming pale towards apex. Palpi yellow- 

 ish, the two basal joints of labial palpi, black. Teguhe and costa- of 

 wings, yellow. Legs, including coxae, uniformly reddish yellow, the 

 pulvilli and claws, black. Metatborax slightly rugulose at sides, 

 smoother above, the disk bicarinated. Abdomen as in P. annulipes 

 Br., the punctures on first segment reticulated, on the disk of the second 

 segment is a rather large, irregular, opaque depression, the surface of 

 which is wrinkled, the surface of the segment surrounding this depres- 

 sion punctured, as are the following segments. Wings hyaline ; stigma 

 and veins brown-black, a spot between the parastigma and stigma and 

 the extreme apex of the stigma and the postmargiual vein, yellowish; 

 areolet oblique, quadrate. 



Habitat. — Los Angeles, Cal. 



Described from a single specimen, reared by Mr. Albert Koebele, in 

 March, from a Pterophorus living in stems of Baccharis pilularis. This 

 species approaches nearest to P. tenuicornis Or., but its slightly smaller 

 size, smoother bicarinated metatborax, differently sculptured abdomen 

 and the clear wings, readily distinguish it. 



Pimpla gossypii sp. nov. 



Female. — Length, 5 mm ; ovipositor, 3 mm . Black, shining; the head 

 and thorax with a few scattered punctures ; abdomen with distinct, 

 coarse punctures. Palpi, trochanters, tibiae and tarsi, white ; the mid- 

 dle and posterior tarsal joints tipped with black ; the posterior tibiae 



