26 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 64. 



two streaks in position of notauli reaching to scutellum, scutellum 

 except medially at base, pronotum largely, fully half of mesopleurum 

 in irregular spots, postscutelliim and a spot flanking it on each side, 

 lower side of metapleurum, and the propodeal carina; base of petiole 

 also yellow; legs, except yellow knees, entirely testaceous; wings 

 hyaline, venation dark, stigma luteous, costa and tegulae pale yellow. 



Male. — Essentially like female; genital sheath very shortly ex- 

 serted, strongly compressed and very broad at apex; tarsal claws 

 much more densely pectinate than in female. 



Type-locality. — Roswell, New Mexico. 



Allotype-locality. — Las Cruces, New Mexico. 



Type.— Csit. No. 25983, U.S.N.M. 



Described from two females, the type taken April 15 by T. D. A. 

 Cockerell and the paratype, from which the abdomen beyond the 

 third tergite is missing, taken on Larrea at Las Cruces, New Mexico, 

 in the spring of 1896 by Elgin Holt; and the allotype without other 

 than the locality label. 



PANISCUS TRITUBERCULATUS. new species. 



Much larger than any other North American species and other- 

 wise very distinct in the structure of the propodeum. 



Female. — Length 25 mm.; antennae 22 mm. 



Temples nearly flat and strongly receding; occipital carina strong 

 and complete though obsolescent medially and approaching very 

 closely to the ocelli; face nearly quadrate; clypeus rather long, 

 simply convex, and weakly emarginately truncate; frons much 

 narrower than face; ocelli very large, touching the e3'es, postocellar 

 line barely a third as long as ocellar diameter; antennae slender, 

 first flagellar joint nearly as long as combined length of second and 

 third, middle joints twice as long as thick. Thorax finel}^ opaque; 

 notauli deep and extending well back on disk of mesoscutum; scu- 

 tellum carinate only basally; mesopleurum shining, inconspicuously 

 punctate, furrows obsolete; metapleurum tuberculate above; propo- 

 deum very finely transversely opaquely aciculate, with a rounded 

 tubercle in basal middle and the apical carina represented by lateral 

 rounded hardly carinate tubercles; areolet petiolate, hardly as long 

 as high, the second intercubitus strongly broken; second recurrent 

 slightly postfurcal, nearly evenly curved, posterior bulla below 

 middle; nervulus shortly postfurcal; postnervulus broken below 

 upper third, inclivous; nervellus broken at about upper two-fifths; 

 legs long and stout; hind femur three-fourths as long as tibia; tibia 

 very nearly as long as tarsus; tarsi rather stout, very densely and 

 finely pubescent beneath, fourth joint of middle tarsus about a third 

 longer than broad at apex, apical joint slightly longer than second, 

 claws very large with about eighteen large teeth and a few small 



