Biological Papers. 287 



and generally very fine and short, but longer on cheeks, 

 lateral dngles of metathorax, and basal segment of ab- 

 domen; punctures on head small, coarse on thorax, and 

 all confluent; abdomen finely and rather thickly punc- 

 tured. Flagellum of antennae scarcely tinged with ful- 

 vous color on under side at tip. 



Clypeus equal in length and breadth, lower sides oblique, 

 extremity subbidentate, punctures coarse and elongate, 

 confluent, upper and lower edges black, yellow inwardly 

 except a large central black space which extends down- 

 ward from upper edge, gradually increasing in width 

 until it suddenly terminates with two incurved margins 

 meeting in a point below the middle. 



The other yellow ornamentation are as follows: Spot at 

 base of mandibles; lower surface of scape; spot on 

 front almost between antennal insertions; small dash 

 behind the upper portion of each eye; upper margin of 

 prothorax narrowly in front but rather broadly out- 

 wardly; tegulae except fulvous spot in middle; spot 

 beneath on pleurae; spot on each side of scutellum, and 

 all of postscutellum (which is rounded behind), and the 

 apical margins of five abdominal segments above and ^ 

 below, with an apical spot on upper side of apex. 



The first abdominal margin is abruptly enlarged on sides 

 and very narrow beneath; all margins on the upper side 

 are more or less sinuate in front, and together with 

 those on the venter curve forwards on the lateral edges. 

 The second to fourth ventral margins are wide, except- 

 ing an arcuate constriction on fore edge near each side. 



Legs yellow, except the femora, which are pale only at 

 tip, but rather obliquely so on the sides of the anterior 

 and middle pair, and all the tarsi are tinged with ful- 

 vous; apical spur of hind tibiae and its basal area black. 



Posterior face of the metathorax dull, very faintly striated, 

 divided by a median carina into two areas which are en- 

 closed by a ridge with a protruding blunt angle on each 

 side. Abdomen elongate, first segment short but about 

 as wide as the second; the transverse groove appears 

 to be the offset of a carina. The black areas on the 

 upper part of the abdominal segments, and the dorsum 

 of thorax where not rubbed, apparently owe much of 

 their subopaqueness to a fine pollinose coating. Wings 

 dusky, tinged with brown along fore margin, and clouded 

 apically. 



Length, 8.5 mm.; wing, 7 mm. 



Symmorphus walshianus Sauss. Kansas, Lawrence; June. New to the 



Kansas list. 

 Monobia quadridens L. Kansas, Lawrence; July; August. 



