1SG5.] 101 



"Indiana" (Westwood) ; Illinois (Dr. Lewis, Walsh and Kennicott). 

 Coll. Viut. Soc. Philad. and Chicago Academy of Sciences. 

 Six $ , eleven % specimens. 



15. Philanthus albifrons. n. sp. 



Black; face white in 9, sides of face, clypeus and large round spot on the 

 front in % also white ; interrupted line on collar, tegulse, spot beneath the 

 wings, line on postscutellum. tibise and tarsi, spot on each side of first abdomi- 

 nal segment, broad interrupted band on second segment and apical fascise on 

 three following segments, yellow or whitish ; wings yellowish dusky. 



Fi-malr. — Black, shining, thinly pubescent; head and thorax with 

 sparse tine punctures, the former transverse and much broader than 

 the thorax ; the face beneath the antennae, extending a little above on 

 the frontal orbits and a little emarginated between the antennae, and 

 the clypeus, white ; mandibles, except tips, and a line behind the sum- 

 mit of the eyes, yellow; antennae black, rather short, thickened, base 

 of the flagellum narrowed, the joints with more or less distinct testa- 

 ceous spots beneath, the scape whitish in front. Thorax : mesothorax 

 sparsely punctured, with a broad shallow dorsal channel, and a finely 

 impressed longitudinal line on each side over the tegulae; scutellum 

 with a central impressed line ; an interrupted line on the collar, a spot 

 beneath the anterior wing, postscutellum and the tegulae, yellowish- 

 white ; metathorax pubescent, closely and indistinctly punctured, with 

 a central impressed longitudinal line. Wings stained with fulvo-fus- 

 cous, darker and subviolaceous at tips; nervures honey-yellow. Legs: 

 coxfe and trochanters black ; femora honey-yellow, black at base and 

 yellow at tips, especially on the posterior pair ; tibias and base of tarsi 

 yellow ; rest of tarsi more or less dusky. Abdomen oblong-ovate, 

 strangulated at base, the second and third segments deeply incised at 

 base; the three basal segments with very deep, large, scattered punc- 

 tures, the apical segments almost impunctate. smooth and polished ; 

 basal segment globose above with a yellow spot or dot on each side of 

 the middle; second segment with a broad, median yellow band, always 

 interrupted in the middle; the three following segments with an apical, 

 continuous yellow band, dilated on the sides ; apical segment dusky, 

 yellow at base; beneath piceous, polished, the second and three follow- 

 ing segments with a yellow spot on each side, very small on the second 

 segment, and very large and sometimes confluent on the following 

 segments. Length 6 lines; expanse of the wings 10 lines. 



M<tle. — Very similar to the I'emale, differing principally in the orna- 

 mentation of the head, which has a broad line on each side of the face. 

 a large rounded spot on the front just above the antennae, the clypeus 



