64 Myron Harinon Szvenk 



sometimes extends broadly down to level of antennae), posterior orbits 

 except at extreme lower end, mesoscutum except a median line, lobes 

 of mesoscutellum, sometimes a line on metanotum, large spots usuallj' 

 involving most of mesopleura, and areas on posterior face of propodeum 

 surrounding the yellow spots on the sides of the propodeum and enclosure 

 which sometimes completely suffuse these yellow spots and involve most 

 of the posterior face of the propodeum except the median line, red instead 

 of black as in typical eirodi. 



Material. — West Point, Nebraska, two males as above men- 

 tioned. 



Nomada eirodi belongs to the obliterata-craivfordi-morrisoni- 

 etc. group, but the female differs from the corresponding sex of 

 all of these in the complete lack of yellow on the first abdominal 

 tergite, except from obliterata, and from that species it can be 

 separated easily by the characters given in the table. The male 

 differs from obliterata J* in the distinctly shorter third antennal 

 joint, in having less yellow on the face and the lateral face marks 

 broad above and ending not much above the level of insertion of 

 antennae (extending nearly to summit of eye in obliterata) , in 

 having a complete yellow band on tergite i (in obliterata the 

 band is usually narrow and widely interrupted, often reduced to 

 lateral spots), and in having the normal three submarginal cells 

 (usually only one or two submarginals in one or both wings in 

 obliterata) . From craivfordi J* it differs in smaller size and in 

 having the clypeus covered with a rather dense, appressed silky 

 pubescence, most conspicuous in profile. 



Nomada (Heminomada) crawfordi Cockerell. 



1905. Nomada crazi.'fordi Cockerell, Bull. 94, Colorado Exp. Sta., p. 



79,?. 

 ?I905. Nomada giUettei Cockerell. ibid., p. 81, <^. 



1906. Nomada craivfordi Cockerell, Bull Am. Mus. Nat. Hist., XXII, 



PP- 437-38, (^. 

 Pigo/. Nomada ednae Cockerell, Ann. Mag. Nat. Hist., ser. 7, XIX, 



pp. 537-38, c^. 

 191 1. Nomada crazaffordi Cockerell, Proc. U. S. Nat. Mus., XLI, pp. 

 239-40, d". 



This species is represented by a series of three females and 

 four males from West Point, Nebraska, and an additional male 



64 



