534 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.45. 



ish spot on the sixth tergite; legs rather densely clothed with gray 

 hair; wings dusky hyaline; costa and stigma brown, the rest of the 

 venation pale brown. 



Male. — Length 3.5 mm. The above description of the female will 

 apply well to this sex, but the tarsi are pale brown and the yellow 

 spot covers the base of the seventh tergite; the fifth tergite is smooth, 

 impunctate. 



Tr3^on, North Carolina. Described from one female and one male 

 recorded under Bureau of Entomology Number Hopk.U.S. 3070b. 

 Material collected by W. F. Fiske. 



Type.— Cat. No. 15507, U.S.N.M. 



XYLONOMUS (XYLONOMUS) LEPTUR^ffi, new species. 



Female. — Length to the apex of the abdomen 14 mm.; length of 

 the ovipositor 1 1 mm. This species agrees with Xylonomus ruficoxis 

 Rohwer in having the basal area poorly defined. It is closely related 

 to ruficoxis, but may be separated from that species by its smaller 

 size, black posterior coxae, bases of the tibiae banded with white, 

 and in having the prescutum margined with rufous. 



Cherrydale, Virginia. Described from one female recorded under 

 Bureau of Entomology Number Hopk.U.S. 7522c, material collected 

 by R. W. Van Horn. This note states that this species is parasitic 

 on the larvae of Leptura nitens. The adult female (type) was bred 

 May 20, 1908. 



Type.— C&t. No. 15489, U.S.N.M. 



PRISTATJLACUS FLORID ANA, new species. 



This species belongs to the genus Pristaulacus in the strict sense and 

 is related to flavicrurus Bradley, but may be separated from this species 

 by the dark spot occurring along the median vein of the fore wings; 

 by having the head shining and below the ocellus with only setigerous 

 punctures; by punctiform fovese behind each lateral ocellus; by having 

 the postocellar line distinctly longer than the ocellocular line and the 

 intraocellar line distinctly greater than the greatest diameter of the 

 anterior ocellus. These differences are taken from the metatype of 

 Bradley's species in the collection of the United States National 

 Museum. According to the metatype oi fl,avicrurus the postocellar 

 line is subequal with the ocellocular line, and the intraocellar line is 

 distinctly shorter than the greatest diameter of the anterior ocellus. 



Female. — Length, 14 mm.; length, of the antennae,11.5 mm.; length 

 of the ovipositor, 20 mm. Head shining; the clypeus and the area 

 immediately around the antennae opaque, mth fine granulations ; no 

 depression in front of the anterior ocellus; third antennal joint about 

 one-third shorter than the fourth; prescutum not gibbose, faintly 

 emarginate; metepisternum striato-reticulate, posteriorly the striae 

 predominating; posterior coxae without a tooth; the tooth of the 



