HENRY L. VIERECK. 395 



yellowish ; the anterior margin of the clypeus blackish, and the pos- 

 terior and lateral yellow margins of the clypeus joined together 

 leaving the black portion of the clypeus in outline like a conven- 

 tional toadstool. 



This species was captured by F. H. Snow in August, 1902, and 

 in July. 



Odyiieriis (Stenodynerus) cochiseusis n. sp. 



Differs from the description of vagus (Sauss., Amer. Wasps) in 

 structure, color and sculpture as follows : 



9.-7 mm.— fleorf.— Hardly wider than bigh ; black and yellow; on the ver- 

 tex nearly halfway between the anterior ocellus and the posterior margin of the 

 head there is a small flat shining space which gives the appearance of being a 

 flattened tubercle; mandibles brownish at tips, black along the edge, greater 

 portion of basal two-thirds yellow; clypeus mostly yellow, the anterior lateral 

 margin edged with black, the anterior margin brownish; the yellow mark 

 between the insertion of the antennae ovoid in outline ; scape with its basal half 

 and the anterior aspect of the remaining half yellow, the portion of the head 

 fitting into the emargination of the eye completely yellow ; cheeks with a yellow 

 mark along the eye margin at the top of the head. 



T/iorflx.— Apparently no flat space on either side of the metauotum adjoining 

 the postscutel ; metathorax rounded, the rugu lose excavation not margined but 

 bisected by a rather indistinct raised line; anterior half of the pronotum yellow, 

 tegulse yellow, excepting a testaceous cuneate mark in the middle; mesothoracic 

 episternum with a yellow mark beneath the tegulse, this mark separated by a 

 black line; directly back of the tegulie there is a yellow cuneate process and an 

 almost quadrate yellow spot on the posterior third of the dorsulum ; postscutel 

 yellow; a large yellow mark on each side of the metathorax; wings transparent, 

 somewhat clouded, especially in the cells along the anterior margin; cox* 

 mostly yellow in front and black behind; trochanters black ; anterior and mid- 

 dle femora almost completely yellow ; posterior femora mostly black, tipped with 

 yellow; tibiae and tarsi mostly yellow, the latter more or less brownish near the 

 apex and at the apex ; claws brown. 



Abdomen.— B\a.ck and yellow; first dorsal segment with a yellow apical band 

 that is prolonged anteriorly for a short distance along the lateral margin and 

 then obliquely inward toward the middle line, making an interrupted transverse 

 baud with its fellow; the pattern on the dorsum of the second segment pretty 

 much the same as on the first segment, but the oblique bands come closer 

 together, and the yellow apical band is confined chiefly to the channel which is 

 bounded apically by a low flange which when viewed from the side makes an 

 j»obtuse ajigle with the rest of the segment; second ventral segment yellow, with 

 the exception of a quadrate black area occupying the middle two-fourths of the 

 basal two-thirds of the segment and a brown line in each yellow lateral border; 

 third, fourth and fifth dorsal ventral segments with an apical yellow band ; the 

 following dorsal segments mostly yellow, the follow ventral segments mostly 

 black. 



TKANS. AM. ENT. SOC. XXXIII. JANUARY, 1908. 



