20 PEOCEEDI]SrGS OP THE NATIONAL MUSEUM vol.72 



pointed ; antennae slender, tapering slightly toward apex, scape and 

 pedicel of nearly equal length, scape squarely truncate at apex. 

 Thorax largely rugose; pronotum polished above, longitudinally 

 rugose below; mesoscutum irregularly transversely rugose, middles 

 of three lobes granularly opaque to subopaque ; scutellum irregularly 

 rugose at sides, the median groove polished, basal fovea coarsely 

 foveolate; postscutellum transversely carinate; mesopleurum above 

 longitudinally striate with a large smooth speculum, below coarsely 

 punctate, sternum more finely and sparsely punctate, sternauli short 

 but deep; combined propodeum and metathorax subhemispherical, 

 coarsely reticulate rugose, the propodeal neck constricted, spiracles 

 elongate oval; wings small, discoideus and subdiscoideus of equal 

 length and continuous, the second discoidal cell therefore pointed at 

 base, postnervulus strongly reclivous; longitudinal veins in hind 

 wing wanting beyond cross veins, intercubitella and cubitella forming 

 an unbroken curve. Abdomen granularly opaque, very slender, first 

 and second tergites equal in length and together comprising more 

 than half total length of abdomen. 



Head and thorax yellow with the following black or blackish 

 markings : spot on vertex enclosing the ocelli, occipital spot, longi- 

 tudinal mark on each lobe of mesoscutum, basal and longitudinal 

 grooves of scutellum, lateral areas of scutellum and postscutellum, 

 a median and two lateral stripes on propodeum joined at base by a 

 transverse band, and a longitudinal spot on mesopleurum ; wings 

 hyaline, venation black; front leg yellow, with femur largely 

 stramineous; tibia below and tarsus reddish stramineous; middle 

 legs similarly marked but the stramineous partly replaced by pice- 

 ous; hind legs largely black, coxa except outer side and trochanter 

 and femur at base below yellow, femur dark reddish below, calcaria 

 yellowish. Abdomen blackish above, ferruginous laterally beyond 

 second tergite. 



Male. — Essentially like female, but eyes a little less strongly 

 convergent. 



Type locality. — Concordia, Entre Rios, Argentina. 



Host. — C actoMastis cactorwm. 



Type.—C2it. No. 40447, U.S.N.M. 



One of each sex reared in February, 1925, by Alan P. Dodd under 

 his No. 106. 



CREMASTUS (ZALEPTOPYGUS) MORDELLISTENAE Cushman 



A series of specimens has been received from Charles H. Hicks, of 

 the University of Colorado, and reared by him under his numbers 

 333 and 567 from a species of MordeUistena. The females show 

 that the type is not normally colored, apparently stained. In the 

 normal female all the markings of the head, the mandibles, and the 



