84 Proceedings of the Biological Society of Washington. 



brown stigma, the distances between apices of auxiliary, first and second 

 veins about equal; anterior cross-vein opposite end of auxiliary vein and 

 at basal third of discal cell ; last section of the fourth vein without stump 

 and only slightly sinuate; apex of second vein distinctly beyond posterior 

 cross-vein. Halteres with white stem and dark knob. Length : Body 

 about 3 mm., wing 3 mm. 



Female. — Frons narrow, parallel-sided, black posteriorly and with a 

 median ridge extending beyond middle, the anterior third silvery- 

 sericeous. Coloration of body and legs as in the male. Abdomen 

 elongate-ovate, strongly gray pruinose on the sides. Ovipositor yellow- 

 ish, short, a slender sharp blade extending to base of fifth segment, the 

 fifth and sixth segments expanded beneath and with a deep median 

 groove for the reception of the ovipositor. Length : Body about 2.5 mm., 

 wing nearly 3 mm. 



King City and Pleasanton, California, a series of males and females 

 reared from Eutettix tenella by W. P. Hartung. 



Type: Cat. No. 19,163, U. S. Nat. Mus. 



Pipunculus vagabundus new species. 



Male. — Frons a narrow wedge extending more than half-way to pos- 

 terior eye-margin, silvery pollinose; ocellar triangle acute, black, sepa- 

 rated from frons by a short contiguous eye-zone. Face silvery, as broad 

 as base of frons. x\ntennae black, the third joint abruptly acuminate, 

 drawn out into a sharp point; arista black. Occiput black, shining, the 

 sides silvery. Mesonotum black, subopaque on the disk, more shining 

 at the sides; humeri silvery gray; pleurae shining black. Scutellum 

 black, shining; postnotum shining black. Abdomen longer than head 

 and thorax together, subfusiform, broadest at apex of second segment; 

 black throughout and without trace of pruinosity, dull basally, becoming 

 shining upon the fifth segment and hypopygium, with scattered short 

 black hairs at the sides. Hypopygium strongly asymmetrical, shorter 

 than the fifth segment, in dorsal view the left portion depressed deeply, 

 canaliculate and with oblique sinuate lateral margin, the thickened por- 

 tion to the right with a deep apical indentation, the lobe on the right of 

 which projects slightly beyond the general mass. Legs black, the 

 extreme apices of the femora and tlie bases of the tibiae yellowish ; tarsi 

 brownish yellow, the last joint tinged with black; hind trochanters 

 unarmed; hind tibiae subclavate and first joint of hind tarsi thickened. 

 Wings rather short, broadly rounded at apex, hyaline, without stigma; 

 anterior cross-vein about ojiposite apex of first vein and slightly before 

 middle of discal cell ; second vein terminating much before posterior 

 cross-vein ; last section of fourth vein without stump, sinuate. Halteres 

 white, black at base. Length: Body about 3 mm., wing 2.8 mm. 



Female. — Frontal stripe rather broad, slightly widened medianly, 

 silvery pollinose, the ocellar triangle shining black. Occiput shining 

 black in the middle, the sides silvery pruinose. Abdomen wholly black, 

 shagreened, more shining posteriorly, the sixth segment highly polished. 



