322 WILLIAM J. FOX. 



Clypeus distinctly bilobate medially. 



Joints of the flagelliim irregular; dorsulum witli very indistinct, sparse jninc- 

 tures; femora, except tips, black iiior<liiiaf us. 



Joints of the flagellum not, or the bHsal joints are slightly irregular: dorsulum 

 with very fine, longitudinal striations; legs entirely fulvous. .fulvipes. 



MALES. 

 Apical joint of antennfe not spatulate, pointed at tip. 



Third and fourth joints of the antenuse about equal in length, tlie third pos- 

 sibly a little the longer ainericaiius. 



Third joint of antennse distinctly longer than the fourth iiiordiiiutiis. 



Apical joint of the antennte somewhat spatulate f 'ratei'ilii$$. 



1. Stigmus ainericanus Pack. 



9- — Clypeus emarginate medially; inner eye margins rather strongly con- 

 verging towards the mouth. Head glabrous, the frontal impression wanting, or 

 very faint; head above almost quadrate, but it narrows distinctly behind; an- 

 tennse thickest medially, the joints not irregular, the third distinctly longer 

 than the fourth, apical joint not at all spatulate; dorsulum indistinctly and 

 sparsely punctured, between the very deep outer grooves on the fore part of the 

 dorsulum it is very finely striated ; metathorax rather strongly rugose, the upper 

 surface with a longitudinal, somewhat ovate enclosnre, which is divided by a 

 strong medial ridge, within with transverse rugae ; mesopleurge shining with 

 three strong, foveolate furrows, which form a triangle ; petiole of abdomen lon- 

 ger than the posterior coxse and trochanters combined, strongly^sulcate. Ab- 

 domen glabrous, black; mandibles, except tips, palpi and the tubercles, white; 

 antennae, tegulae, tip of abdomen and legs, except the hind femora, yellow-testa- 

 ceous. Wings hyaline, iridescent, the nervures and stigma testaceous. Length 

 4 mm. 



"J, . — Anterior margin of clypeus produced in the middle ; inner eye margins 

 strongly converging towards the month, more so than in the female, the space 

 between the eyes at the clypeus is about one-third less than the vertex. Head 

 glabrous, transverse, rounded behind, the frontal impression distinct, but faint; 

 antennae elongate, apical joint pointed at tip, not at all spatulate, third and 

 fourth joints about equal in length ; dorsulum as in the female; metathorax as 

 in the female, except that the enclosure on upper surface is shorter and broader, 

 and is irregularly sculptured within; petiole of abdomen decidedly longer than 

 the hind coxae and trochanters united, not as long as the first three joints of the 

 hind tarsi united, strongly sulcate. Abdomen glabrous; black; clypeus with 

 silvery pile ; ornation as in the female. Length 4 mm. 



Illinois; Beverly, Mass.; Camden County, N. J. (June 28, 1891). 



2. Stigiuu!« iiiordiiiatus n. sp. 



9 .—Anterior margin of the clypeus in the middle bidentate or bilobate ; inner 

 eye margins converging but little towards the mouth; frontal impressed line 

 distinct. Head above transverse, distinctly narrowed behind; antennae thick- 

 ened apically, the joints irregular, third joint slightly longer than the fourth, 

 the apical joint not at all spatulate ; front on each side of impressed line rather 

 strongly convex; dorsulum between the impressions on anterior portion finely 

 striated, otherwise with indistinct, sparse punctures; scutellum not impressed ; 



