Biological Papers. 281 



2. Flagellum of antennae fulvous beneath, black above, third basal joint 

 sometimes black, agilis. 

 Flagellum of antennte almost wholly fulvous, scarcely darkened above, 

 and merely marked with fine transverse black lines or dashes at ex- 

 treme base and apex of each joint, agilis, var. snowii. 

 In a paper entitled "The Bees of Boulder County, Colorado," published 

 by Prof. T. D. A. Cockerell, in University of Colorado Studies, volume IV, 

 No. 4, other varieties of agilis are designated according to the absence or 

 presence of a yellow spot on labrum and mandibles. 



Melissodes blmaculata Lep. ( = binotata Say). Kansas, Lawrence; July. 



grindeliaa Ckll. Colorado, Manitou; August. 



lupina Cr., new var. composita. Colorado, Colorado Springs; 

 August, 1906. Types: three male specimens. 

 Black, clothed with grayish pubescence, somewhat fulvous on 

 dorsum of thorax; clypeus yellow, except lower fulvous 

 edge and a black line on each side reaching nearly half way 

 down from the upper angle; labrum yellow unless darkened 

 on sides; mandibles with basal yellow spot and fulvous 

 stripe before the tip; antennae two-thirds the length of the 

 body, three basal joints wholly black, the third joint about 

 twice the size of the second, following joints ferruginous 

 beneath, black above; eyes greenish; tegulse shining dusky 

 brown to piceous, pubescent ; wings dusky hyaline with 

 apical margin faintly cloudy, nervures dark fuscous, second 

 submarginal cell nearly square and receiving the first re- 

 current nervure at two-thirds of its length, third cell 

 rounded behind on upper portion and narrowed less than 

 one-half its length against the marginal. 

 Abdomen shining, segments 1 to 4 broadly margined behind 

 with testaceous, which also shows on the posterior edge of 

 the fifth segment ; basal segment clothed with long, sparse, 

 white pubescence, subfasciate on apical margin for entire 

 length in case it has not been denuded ; second to fourth 

 segments each with a subapical fascia of whitish appressed 

 but rather loose pubescence, curved inwardly at middle 

 but reaching apical margin at sides, a subbasal line of thin- 

 ner pubescence diffused at middle on the second segment, 

 apical segments covered with dense pubescence which en_ 

 tirely conceals the sixth with a darker shade of fulvous; a 

 black tooth projects from the base on each side of three 

 apical segments, the posterior pair being acute, the middle 

 one extra large and stout, and the anterior small and short, 

 except on one specimen, which has only four distinct teeth 

 at sides, besides having all the fasciae fulvous in color; 

 venter clothed with long grayish pubescence on the sides, 

 apical margins with appressed fulvous pubescence. Length, 

 10 mm. 

 These examples differ decidedly from M. agilis and its evident 

 variety M. snowii, and also from M. aurigenia, on ac- 

 count of darker nervures of wings, arcuate fasciae of ab- 



