232 p. CAMERON. 



metauotura is very strongly punctured — in the present species only 

 very slightly — and is bordered all round by " very salient and tren- 

 chant ridges ; " this species is stated, I. c. p. 209, to be distinct " by 

 the strength of the ridges of the nietathorax ; " in minnesotiznsis 

 these can hardly be said to exist, either above or on the broadly 

 rounded sides. Characteristic, too, of the species I have describetl 

 is the very broad colored band on the apex of the first abdominal 

 segment. 



.^- SPHEGID^. 



Trachypus annulitarsis sp. nov. 



Black ; the clypeiis bright orange-yellow, a narrow pale line on the sides of the 

 first abdominal segment at the apex, a larger one, curved, broad on the outerside. 

 narrowed on the inner shortly beyond the middle of the second and an irregular 

 curved line, narrowed in the middle, on its apex below, of a paler yellow color. 

 Antennte dull rufous brown below, the base of the scape yellowish. The apes of 

 the anterior femora and the four anterior tibise below yellow; the second and 

 third joints of the hind tarsi pale yellow, black at the apex. Wings hyaline, 

 suffused with fuscous violaceous; the stigma dark fuscous, the nervures blacker. 

 9 . Length 17 mm. 



Front closely, longitudinally striated, the strite intermixing; the vertex shin- 

 ing, sparsely, weakly punctured. There is a pale yellow spot at the base of the 

 mandibles; a reddish one near the apex. Pronotum and mesonotum smooth, 

 shining, the basal half of the mesonotum with three wide, deep furrows, of 

 which the central is the wider and deeper; there is a shallow furrow in the mid- 

 dle of pronotum. Basal region of metanotum bare, smooth, shining, the rest 

 closely punctured, as are also, but less strongly, the pleurse; the fovea large, 

 rounded and widened at the apex, deep in the centre there. Propleurse finely, 

 closely obliquely striated. Mesopleurse closely, distinctly, but not very closely 

 punctured. Abdominal petiole about two-thirds of the length of the thorax. 



The central lobe of clypeus depressed ; the sides above forming tubercles. The 

 second abscissa of the radius is about one-fourth longer than the third, longer 

 compared with it than in T. mexicanus. Tliere are two small, whitish-yellow 

 spots on the apex of metanotum. 



Allied to T. mexicanus Sauss. 



o/ MIMESID^. 



Pseii coloradoeuxiis sp. nov. 

 Black, the face and clypeus densely covered with silvery pubescence; the 

 apex of clypeus broadly rounded, the hinder ocelli separated from eaeh other by 

 a slightly less distance than they are from the eyes; the metanotal area large, 

 the lateral keels oblique, not uniting at the apex, which is narrow and trans- 

 verse, and bearing a few irregular oblique striic, the middle being smooth ; the 

 apical sloi)e and the metapleura; are stoutly reticulated. Abdominal petiole as 

 long as the hind femora, of equal width throughout; there is a keel down its 

 centre, the sides being also bordered by a keel. The recurrent nervures are 

 received about the same distance from the base and apex of the second cubital 



