new and little-known Hymenoptera. 455 



confused with M. perplexa^ Cress., but again differs by the 

 black antennas. It has also some resemblance to Tetrahnia 

 jIagelUcornis, Sm., from Oajaca. From J/, ruidosensis, Ckll., 

 common in the same localities, it may be known by the lower 

 half of the clypeus only being yellow, the absence of the two 

 raised lines or keels on the flagellum, and the pale instead of 

 black hair on the abdominal segments above the bands. 

 From M. confusa, Cr., it differs constantly in the clypeal 

 coloration at least. 



M. cremdaticornis was also collected by Prof. C. H. T. 

 Townsend as follows : — Below Big Rock crossing, Ruidoso, 

 N. M., Aug. 21, 1898, on flowers of Geranium atropurpureum^ 

 Heller, 1 ^ ; Big Rock, Ruidoso, July 27, on flowers of 

 Vicia, sp., also July 29, same place and flowers. The 

 specimens from Vicia represent a form maculata, with a small 

 yellow spot on the base of the mandibles. 



Crahro Packardii, Cress., 1865. 



Three, one much larger than the others, Ruidoso, N. M., 

 65U0 feet, July 21, on flowers of Cicuta occidentalis (C. H. T. 

 Tvicnsend). 



Ceropales fraterna, Sm., subsp. occidentalism nov. 



(^ . — Length b\ millim. 



Markings very bright yellow ; scutellum with a trans- 

 versely diamond-shaped yellow mark ; postscutellum with 

 a large nearly semilunar yellow markj band on first abdo- 

 minal segment deeply emarginate above, but not interrupted, 

 band on second segment also emarginate above ; femora 

 black, rufous, and yellow, anterior femora rufous in front, 

 with the base black and the extreme apex yellow ; anterior 

 tibise yellow in front and rufous behind; first joint of middle 

 tarsi yellow ; wings quite dusky, apical margin narrowly 

 darker; abdomen very minutely roughened. Otherwise the 

 insect seems to agree with p-aterna. The front is extremely 

 closely punctured, with scattered larger shallow punctures ; 

 the mesothorax has a similar double punctuation, but the 

 larger punctures are large and deep, numerous, but irregu- 

 larly arranged. The posterior orbital margins have only an 

 inconspicuous interrupted yellow line. 



Hah. Ruidoso, IS. M., about 6500 feet, July 21, on flowers 

 of Cicuta occidentalis {C. H. T. Townsend). 



This is probably the western form mentioned by Fox 

 (Trans. Am. Ent. Soc. 1892, p. o2). 



