Vol. 1] Bradley. — The Taxonomy of the Masarid Wasps 413 



Color black and piiiard yellow, the latter distributed as follows : 

 elypeus, labriim, mandibles except base and apex, inner orbits above 

 emargination, line behind eyes, broad humeral stripe, tegula, small 

 spot in front on tip of pronotum and within on mesonotum in front of 

 scutellum (sometimes wanting), large spot below tegula, two short 

 stripes on mesonotum behind (usually absent), large or small apical 

 spot on scutellum, usually the angles of the propodeum ; legs beyond 

 middle of femora, sometimes also base of middle femora behind and 

 spot on front and middle trochanter and coxae behind ; subapical band 

 on dorsal segments 1 to 5, varying in width and nature of its lateral 

 incisions, the fifth usually enclosing a black spot on each side, most of 

 sixth and apical half of seventh segments, spot at side of second and 

 third ventral segment, sometimes prominence of third posteriorly, and 

 nearly all of the fourth to sixth ventral segments; antennae yellow 

 grading into deep chrome above, and marked with reddish brown 

 beneath. 



Wings stained yellow, the veins yellow (Mars yellow). Length, 

 17-22 mm. 



The punctuation is variable, the posterior part of the mesonotum 

 and the scutellum being sometimes punctate throughout. The color 

 is also somewhat variable. 



5- Clypeus coarsely rugose at base ; similar to the male, but yellow 

 less extensive, the clypeus and labrum except two small spots, on each, 

 most of mandibles and scape, hind angles of prothorax, mesonotum 

 except spot next to tegula, scutellum except tip and angles of propo- 

 deum except the tooth, more of femora, broader basal parts of ab- 

 dominal segments, nearly all of last ventral segment black, the last 

 dorsal segment black with a large yellow spot on each side ; antennal 

 club fuscous above, Sanford brown beneath. Length, 15-19 mm. 



This is our largest and most handsome species. Its biology has 

 been described by Davidson {loc. cit.). It builds clay nests. 



The subspecies described by Professor Cockerell from California 

 does not appear, on comparison with other specimens from California 

 and elsewhere, to represent more than an individual variation. 



Types. — Lectotype, J*: American Entomological Society, no. 2095. 

 Allotype: American Entomological Society. 



South Dakota: Lead City, 1 5 [American Entomological Society]. 



Idaho: Lewiston, 1 J*, 2 $ ; Craig's Mt., 1 J*, 1 $ [American Ento- 

 mological Society] . 



Colorado: Pikes Peak, 1 J*, 2 $ (W. J. Howard), [tvpes, American 

 Entomological Society] ; Garden of the Gods, July 13, 1877 [U. S. 

 National Museum] ; Florissant, July 21, 1 $ on flowers of Pentstemon 

 (T. D. A. Cockerell), [American Museum of Natural History]. 



New Mexico: Jemez Springs, May 20, 1913, 1 $; June 2, 1913, 

 6400 feet^ 1 <^ (J. Woodgate), [Cornell University]. 



Utah: Pronotetali, August 21, 1906, 1 5 [Cornell University]; 

 Silver Lake, July 14, 1 J*, 1 $ (H. Skinner), [American Entomological 

 Society] . 



