Sept., 1904.] ViERECK AND COCKERELL : Ph1LANTHID.«. 139 



Cerceris rufinoda var. crucis, new variety. 



9 . Lateral face-marks white ; clypeus, etc., black as in type ; metathorax, ex- 

 cept enclosure, red (black in type); pygidial plate as in type. 



Habitat. — Las Cruces, N. M., at staminate flowers of Croton neo- 

 mexicanuni, September 25, 1895 (Cockerell) ; also one with the sec- 

 ond abdominal segment (as well as the first) red, Las Cruces, August 

 24 (Cockerell). 



Cerceris crotonella, new species. 



9 . Like C. rufinoda var. crucis, but smaller (length hardly over 6 mm. ), with 

 the clypeus and face on each side of it white, and a linear white supraclypeal band 

 reaching nearly to anterior ocellus ; metathorax (except enclosure) and first three 

 segments of abdomen red, except for the usual yellowish- white bands ; stigma brown ; 

 second submarginal cell much smaller, the petiole being about as long as one of 

 the sides ; pygidial plate with the end rounded, and narrower ; venter with the first 

 three segments red, the others black, without markings. 



Hah. tat. — Las Cruces, N. M., at staminate flowers of Croton neo- 

 mexicanum, September 25, 1895, one (Cockerell). The coloration 

 of the face recalls the male of rufinoda. 



Cerceris eriogoni, new species, 



$ . 6.5 mm. Head: Black, with the clypeus except the lower border and 

 lateral face marks yellow ; lateral face marks not extending to the antennae nor to the 

 mandibles but near to the top of the eye ; deeply punctured the punctures adjoining 

 or nearly ; a distinct longitudinal carina between theantennK extending shortly above 

 and below their insertion ; eyes dark somewhat brownish ; joint 3 of the antenna 

 longer than 4, shorter than 4+5; scape orange, flagellum reddish-orange beneath, 

 dark -brown above, mandibles yellow and brown. 



Pronotum slightly depressed medially, the anterior border moderately ridged ; 

 punctured but not distinctly ; traversed by a broken yellow band ; propleura black, 

 presenting a groove bounded by ridges, dorsulum with punctures more separated than 

 those on the head but equally as deep, somewhat shining, tegulK yellow ; mesopleura 

 dull with deep adjoining punctures ; scutellum punctured more like the pronotum 

 than the dorsulum, yellow ; postscutellum black, its punctures five and adjoining ; 

 metathorax shining, punctured like the head, the punctures adjoining, enclosure 

 clearly defined, smooth, with a shallow longitudinal impression which is slightly 

 transversely striate ; wings : first and second recurrent nervures entering the second 

 and third cubital cells respectively as far from the cubitus as the petiole of the second 

 submarginal cell is long, nervures and stigma dark-brown, median cell in the costal 

 corner, marginal cell and apex of wing fuscous ; legs black, apices of femora, four 

 anterior tibise and tarsi, basal two thirds of posterior tibise and metatarsi of posterior 

 legs yellow, tarsi brown. 



Abdomen : Dorsally uniformly punctured like the metathorax, venter indistinctly 

 punctured ; pygidium moderately margined about one and a half times as long as 

 broad, second segment with the apical half orange, segments 3, 4 and 5 with apical 



