HENRY L. VIERECK. 403 



anterior to the scutel, greater portiou of the oval spaces on metauotum, trochan- 

 ters mostly, anterior and middle femora in part, posterior femora at apex, and 

 the greatest portiou of the basal tarsal joints; wings very as in maculipennis. 



Abdomen.— GreAter portion of venter yellow; first, second, third and fourth 

 dorsal segments blackish at base and apex ; dorsal apical segment yellow on each 

 side, the corresponding ventral segment with a yellow spot on each side. 



Types. — University of Kansas. 



Type locality.— Thomas' Ranch, Oak Creek Canon, 6000 ft., 20 

 miles southwest of Flagstaff, Coconino Co., Arizona. 



One paratopotype. Both the latter and the type were taken in 

 August by F. H. Snow. 



Carolinian Species. 

 Pliicnodus caddous n. sp. 



Mesonotal furrows not sharply defined on the anterior half of the 

 sclerite and represented on the posterior half thereof by low rounded 

 raised lines that converge and separately meet or nearly meet the 

 posterior border mesonotum. 



9 .—3 mm. — Heftd.— Smooth, more or less polished and shining and seemingly 

 without sculpture of any kind, different shades of castaneous; the mandibles 

 yellowish testaceous; eyes black; antennte with the first eighteen joints brown- 

 testaceous to brown in color, the next joint yellowish-brown, the next five joints 

 or the remainder of the anteunal joints brown, the scape nearly twice the length 

 ftf the pedicellum ; the combined lengths of the scape and pedicellum not much 

 longer than the first joint of the flagellum, joints of the flagelliim subequal. 



Thorax.— In color about the same as the head, with the exception of the dorsu- 

 lum, each side of which is partly blackish ; dorsulum finely sculptured in part 

 and shining, on the anterior half of this sclerite the space between the parapsidal 

 grooves or where they ought to be is rugose, as seem to be the parapsidal grooves 

 themselves, posteriorly the middle portion of the same region is granular; meso- 

 pleura with an irregularly shaped, impressed, smooth, partly polished, partly 

 granular area occupying the greater part of the lower half of this sclerite, and a 

 small portiop of the upper half, and surrounded by rugose grooves and a rugose 

 area, the latter occupying the greater portion of the upper half of the meso- 

 pleura; metathorax with its sides rugose, the superior and posterior aspects of 

 the metathorax areolated, the posterior aspect in addition transversely reticula- 

 ted, the areolation consisting of six areas formed by an almost equilateral trian- 

 gle enclosed by raised lines and with its base occupying the middle third of the 

 junction between the dorsal and iiosterior aspects of the propodeum, by prolon- 

 gations of the raised line forming the base of the triangle and extending to tlie 

 lateral margin of the metanotum and finally by nearly parallel raised lines ex- 

 tending from the base of the triangle to the apex of the segment and marking 

 off the middle fifth or practically the middle fifth of the posterior aspect of the 

 metathorax, the spines of the metathorax springing from a point near or at the 

 middle of the junction of the sides of the metathorax, with the upper and poste- 



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



