268 THE ENTOMOLOGIST. 



lines; scutellum strongly bilobed, bright red; a little red on post- 

 scutellum ; mesothorax black or faintly red ; tubercles and a patch on 

 pleura beneath them red more or less stained with yellow ; tegulse 

 red ; wings dark at apex ; b. n. going a short distance basad of t. m. ; 

 second s. m. at least as broad above as third ; legs red, hind femora 

 black except at apex ; middle femora with a variable amount of black ; 

 hind basitarsus largely black without ; abdomen very minutely punc- 

 tured, rather light red, first segment with the basal half black, and 

 without any yellow ; second to fourth with broadly interrupted pale 

 yellow bands, or large lateral spots, those on second when very large 

 notched anteriorly at the sides ; fifth and sixth with narrow bands, 

 not or hardly interrupted, that on fifth when well developed notched 

 posteriorly at the sides ; apical plate broad and notched ; venter red, 

 the first segment with a large bilobed black patch, the others more or 

 less stained with blackish, the third and fourth with slight yellow 

 markings, the apex with a large yellow patch. In my tables of Kocky 

 Mountain Nomada runs to N. vicinalis, but differs by its smaller size, 

 base of metathorax with distinct though delicate longitudinal ridges, 

 absence of yellow on first abdominal segment, &c. If the male of 

 X. accepta had been unknown, I should have been inclined to refer 

 snbaccepta to that species ; but Cresson describes male accepta, and it 

 differs by having only the anterior margin of the clypeus light, &c. 

 In many respects it resembles the Canadian A 7 , armatella, Ckll., but 

 the form of the apical plate is different, there is no supraclypeal mark, 

 and the flagellum is not entirely red. In Schmiedcknecht's table of 

 European species it runs to twenty-eight, and runs out because of the 

 red scutellum. 



Hob. Florissant, Colorado, two males, June 13th and 

 15th, 1907 (S. A. Bohwer). One was at flowers of Antennaria 

 microphylla. 



Another male Nomada, taken by Mr. Bohwer at Florissant, 

 on June 15th, also runs to vicinalis in the Bocky Mountain 

 table; while in Bobertson's table (Canad. Entom. 1903, p. 179) 

 it runs to N. illinoiensis. It is really very close to illinoiensis, 

 but it has the hair of the vertex and thorax above ferruginous, 

 the scutellum with a pair of large red spots, and the bright 

 lemon yellow on the abdomen very well developed. Its length is 

 8 mm. I do not describe it as new, because I think it is very 

 likely to prove to be the male of N. cymhalarice, Ckll., hitherto 

 known from a single female. The sexes in this group are so 

 different that their correct association is a matter of great 

 difficulty. 



Melissodes fremontii, sp. nov. 



$ . In nearly all respects, including the structure of the antennre, 

 &c, like M. confusa, Cresson, but differing as follows: — Eyes green ; 

 face conspicuously broader, eyes more diverging above ; antenna? 

 black, but in a strong light most of the flagellar joints show a dark 

 red spot beneath ; abdomen narrower and more cylindrical ; of the 

 four lateral subapical spines which are so prominent in il/. confusa, 

 the anterior ones are very small and easily overlooked, yet quite well 



