92 [August 



and the second, third and fourth joints of the flagellum beneath, pale 

 yellow, the latter fulvous beneath towards the tips. Thorax sometimes 

 entirely black, sometimes the collar has a very narrow, subinterrupted 

 yellowish line, the tubercles a spot, and the scutellum two approximated 

 dots on its middle, but the latter are apparent in one specimen only ; 

 the scutellum is transversely convex, with a slight depression on its 

 disk, and the metathorax has a well impressed longitudinal channel ; 

 tegulse pale yellowish. Wings purely hyaline, slightly iridescent; ner- 

 vures pale honey -yellow. Legs slender, black; extreme tips of the 

 femora and the tibiae, pale yellow; tibiae beneath and the tarsi entirely, 

 dusky, the latter long and slender. Abdomen ovate, subacuminate at 

 tip, the basal segment as broad as the second; the segments rather 

 deeply incised at base ; first, .second and third segments each with a 

 broad, continuous, pale yellow fascia, more or less emarginated on each 

 side posteriorly ; fourth, fifth and sixth segments each with a central 

 transverse yellowish spot, the fourth sometimes with a small spot or dot 

 on each side ; apical segment black, immaculate, subacute at tip ; be- 

 neath black, immaculate, smooth and shining. Length 4:2 lines; ex- 

 panse of wings Si lines. 



Hah. — Illinois, (Dr. Samuel Lewis.) Coll. Ent. Soc. Philad. 



Five % specimens; $ unknown. This curious little species may be 

 easily recognized by the head and thorax being thickly clothed with a 

 beautiful silvery-white pubescence. 



6. Philanthus lepidus, n. sp. 



Black, polished : face, large mark between antennae, line on collar, tubercles, 

 tegulse. postscutellum, tibife and tarsi, spot on eacli side of first segment of ab- 

 domen, and fascise on the remaining segments, broad on the second, bright 

 yellow : wings pale yellowish-fuscous. 



Male. — Black, polished, impunctured; head large, transversely -ovate ; 

 the front prominent, very minutely punctured, with a central longitudi- 

 nal depression beneath the ocelli ; sides of the face, clypeus, spot on 

 base of mandibles, and a dot behind the eyes, bright lemon-yellow; a 

 triangular mark between the antennae, confluent with a large quadrate 

 mark above, bright deeper yellow ; the appressed lateral tuft of the 

 clypeus is silky-ochraceous ; antennae gradually but much thickened to- 

 wards the tips, slender at base, black, the scape entirely, and the four 

 basal joints of the flagellum beneath, yellow. Thorax polished, with- 

 out punctures; mesothorax with a well-impressed central line, and an 

 indi.stinct abbreviated one over the tegula;; a line over the collar, tu- 

 bercles and a transverse spot behind, and the postscutellum, bright 

 lemon-yellow ; metathorax short, rounded behind, smooth and polished, 



