AMERICAN HYMENOPTERA. 125 



The present species is a typical representative of the genus, and 

 comes nearest to M. nigropilosus Ashni. in form, but has pale pubes- 

 cence and a longer pronotum. It differs from the other species in 

 the form of the head and antennae. 



Gonatopus peculiaris sp. nov. 

 Female. — Length 2.75-3 mm. Polished black, except the greater part of head, 

 sutures of legs and base of antennae, which are reddish or yellow. Head dis- 

 tinctly less than- twice as wide as lotig, ferruginous, except a transverse black 

 band between the eyes on the vertex. Mandibles except tips and antenna] scape 

 luteous; pedicel and sometimes base of first flagellar joint yellow; remainder of 

 antennas black. Mesonotum smooth, shining, evenly arched above and not emar- 

 ginate when seen in profile. Metathorax transversely striated before and behind, 

 smooth at the middle. Abdomen polished black. Legs varying from piceous to 

 ferruginous, the coxa? and sutures paler, often luteous. Entire insect very 

 sparsely white pubescent. 



Described from four £ specimens collected near Austin, Texas, 

 in the early spring. They were seen actively running about on the 

 ground, some near the bank of a stream and the others on dry hill- 

 sides. I have also collected G. bicolor Ashm. at Granite Mt., Tex., 

 under stones, and G. contortulus Patton upon low herbage, near 

 Woods Hole, Mass., in the same surroundings as the specimens de- 

 scribed by Dr. Patton. 



This interesting species resembles G. contortulus Patton in form 

 and color, but differs from it as well as from the other species of 

 Gonatopus in lacking the V-shaped emargination upon the meso- 

 notum. 



I<li*is nigricoriiis sp. nov. 

 Male. — Length 2.5 mm. Polished black, legs and antennal scape basally 

 rufous; sparsely covered with pale pubescence. Head shining, very faintly sha- 

 greened. Eyes pubescent, lateral ocelli remote from the eye ; mandibles rufous. 

 Antennae black, except the base of the slender scape, which is rufous; pedicel 

 very small, globular; first flagellar joint large, one and one-half times as long as 

 broad, following joints moniliform, slightly smaller than the first; apical joint 

 longer, obtusely pointed. Thorax very sparsely and finely, but sharply punc- 

 tate; mesonotal furrows deep posteriorly, fading out anteriorly. Pleura' coarsely 

 punctured in front, polished behind. Scutellum with a punctate frenum and a 

 similar row of punctures along its anterior margin. Metathorax finely rugose, 

 its lateral teeth small and acute. First two abdominal segments longitudinally 

 striate, abdomen elsewhere smooth and shining, rather closely pale pubescent. 

 Legs varying from brown to deep yellow or rufous. Wings hyaline, fringed ; 

 basal vein not very distinct, the marginal about three times as long as thick, 

 postmargiual equal to marginal ; stigmal twice as long and knobbed at tip. 



TRANS. AM. ENT. SOC, XXIX. MARCH, 1903. 



