April, 'lO] ENTOMOLOGICAL NEWS 169 



with close, distinct punctures, vertex and posterior orbits sparsely punc- 

 tured; frontal carina not reaching the antennae; ocelli in a triangle, the 

 distance between the lateral ones nearly as great as the distance from 

 one of them to the nearest eye margin ; flagel simple, thickening apically, 

 the first joint scarcely longer than the second, the antennae hardly as 

 long as the head and thorax ; dorsulum and scutel with small, widely 

 scattered punctures ; the upper part of the mesopleurae striato-punctate, 

 the rest of it sculptured as the dorsulum ; enclosure with slightly ob- 

 lique striae, the diamond-shaped area with transverse striae; the rest 

 of the metathorax with large reticulations; legs rather slender; vena- 

 tion normal for Miiiiesa except the first recurrent is interstitial with 

 the first transverse cubitus ; petiole trisulcate, a little shorter than the 

 hind femora ; abdomen elongate, narrow, the sutures distinct. Black ; 

 flagel beneath and tegulae dark testaceous ; anterior tibia; and tarsi, 

 the four posterior tarsi, and knees very pale brown. Wings hyaline, 

 strongly iridescent; venation dark brown. The pubescence silvery and 

 not very dense. 



One paratype is a little smaller, and in two of them the 

 cubital venation is normal. 



Type locality: Clementon, N. J., June 30, 1908. Other 

 localities: Germantown, Pa., July 18, 1908 (Harbeck). 



Type No. 12,858 U. S. N. M. 



Psen Mimesa perplexa n. sp. 



Belongs to group argentifrons of Fox and is related to maculipes 

 Fox. 



9. . Length 8 mm. Anterior margin of the clypeus emarginate, its 

 surface with close, but not touching, punctures ; front with close, fine 

 punctures, vertex and cheeks with widely separated punctures; anteri- 

 nal foveae extending above the antennae and forming a pit at their 

 extremity; ocelli in a triangle, the distance between the lateral ones 

 about the same as the distance from one of them to the nearest eye 

 margin; third antennal joint but little longer than the fourth; dorsulum 

 and scutel shining with small widely separated punctures ; the suture 

 between the scntel and dorsulum foveolate ; middle of the meso- 

 pleurae smooth, shining, laterally and dorsally strongly, longitudinally 

 striated; metanotum with strong, slightly obliquely striated, at the apex 

 with a diamond-shaped area which has a remnant of a transverse 

 stria ; posterior face with sharply defined reticulations ; the metanotum 

 with transverse striae posteriorly; pygidium well defined, closely granu- 

 lar ; petiole robust, short about the length of the rest of the segment, 

 bisulcate. Color black ; flagel beneath, tegulae and tarsi testaceous ; 



