198 p. CAMERON. 



Odyiierus (Pacliyodynerns) cressoiii sp. nov. 



Black ; a broad curved liue, dilated above, on the top of tbe clypeus, an oblique 

 mark, longer than wide, on the sides of the apex, a small squarish mark over tbe 

 antennje, a curved line, dilated on the innerside, on the eye incision, a short line 

 on the top of the outer orbits, a line on the base of the pronotnm, narrowed in 

 the middle, a large mark, longer (counting from the top to the bottom), narrowed 

 and transverse below; the postscutellum, sides of metanotum broadly, distinct 

 bands on the apices of the basal five abdominal segments, that on the first dilated 

 at the base and a semi-circular mark (its base transverse, the apex rounded) on 

 the sides of the second segment, pale yellow, as are also the under side of the 

 antennal scape ; the extreme apex of the clypeus of the apical half of the man- 

 dibles rufous. Wings hyaline, tinged with fuscous violaceous; the radial cellule 

 darker, distinctly violaceous. Legs bright rufo-fulvous, the coxse, trochanters 

 and base of femora black ; the apex of femora and base of tibiai largely yellow. 

 9 ■ Length to end of second segment 9 mm. 



Closely punctured and covered with a gray pile; the apices of the basal three 

 abdominal segments more strongly, deeply, irregularly punctured ; the apex of 

 the second strongly reflexed, depressed behind the raised part, the depression 

 with yellow longitudinal keels, the part between them black; this depression 

 behind is bordered by a band of yellow rugosities; the apex of the third is also 

 reflexed but not so strongly, and is bordered with similar yellow rugosities. 

 Apex of clypeus slightly depressed, transverse. Postscutellum raised, strongly 

 punctured throughout; the apex of the yellow part is roundly curved. Sides 

 of metanotum rounded ; below projecting into longish oblique teeth. The sec- 

 ond and third ventral segments have their apices yellow and are more strongly 

 punctured than the rest. Base of thorax transverse, raised, slightly projecting 

 on the outerside. 



The black on the fore femora below extends beyond the middle, on the four 

 hinder below closely to the middle. Tegulse large, rufous, yellow at the base. 



The coloration of tbe male is nearly the same, but with the yellow much more 

 extended; the clypeus is yellow; the mark on the front is larger, longer and 

 roundly bifurcated above; the eye incision is broadly yellow ; the mandibles are 

 yellow at the base and below, except at the apex where they are rufous; the 

 femora and trochanters want the black; the coxte are yellow below ; the tibiae 

 and base of tarsi are largely yellow in front. The flagellum of antenna is 

 rufous, except on the top. Tegulse yellow, with a rufous spot in the middle. 



The apex of clypeus has a triangular incision ; the clypeus is shining and 

 sparsely punctured. The antennal hook is broad, black and bluntly rounded at 

 the apex ; it is larger and broader than usual. The hind tibise are peculiarly 

 formed ; they have the lower edge at the apex roundly, broadly dilated, this 

 dilated part being clearly separated. The spot on the second abdominal segment 

 is larger, more irregular and obliquely oval ; the yellow line on the first segment 

 is largely dilated backwards laterally ; the line on it broader and dilated in 

 the middle; it has the same depression and rugosities as has also the third, but 

 not so strongly developed ; the three apical lines are almost white. Also the 

 yellow on the postscutellum projects into the dilated part beliind, it being con- 

 sequently not quite transverse as in the 9 ■ 



Oslar : Las Vegas, New Mexico ; July. Allied to 0. toas Cress. 

 Characteristic is the dilated apex of the S hinder tibiae. 



