192 Journal New York Entomological Society. [Vol. xxv^ 



Megachile disparipennis new species. 



5. Very close to M. perpunctata Ckll., from Mexico, but smaller, with 

 paler wings, and more closely and distinctly punctured abdomen. Length 

 about 10 mm.; easily known among the species of the United States by the 

 black cloud in marginal cell and beyond ; ventral scopa pale red, basally white, 

 a little black at end of last segment ; a conspicuous tuft of white hair behind 

 each tegula, and a dense band of white hair on postscutellum ; sides of face 

 and front with pure white hair ; abdomen with narrow white hair-bands ; 

 vertex with black hair. Mesothorax dullish and very densely punctured (in 

 one specimen there is a smooth area on disc, but this is evidently abnormal) ; 

 hind basitarsi only moderately broad, their inner face with bright fox-red 

 hair ; tegulae black, with outer margin reddish ; antennae entirely black. 



Point Isabel, three at yellow composite {IV. P. Cockerell). 



Xylocopa tabaniformis parkinsoniae new subspecies. 



5- Differs from Smith's description of X. tabaniformis by hair of cheeks 

 nearly all black ; flagellum not rufotestaceous beneath ; sides of thorax with 

 black hair; apical -joints of tarsi not ferruginous; tegulse pure black; light 

 hair of abdomen cream color ; first abdominal segment with black hair, a 

 very little pallid at sides apically. 



San Benito, at flowers of Parkinsonia aculcdta. 



Bombus americanorum Fabricius. 



San Benito, one female. The light hair is clear yellow, as in speci- 

 mens from Boulder, Colo. ; not tawny as in those from New Mexico 

 and Illinois. 



The identification of the Argcnione found at San Benito has been 

 a matter of perplexity, but it appears that we must call it A. pimiati- 

 fida Norton (A. delicatula Small). It is distinguished by the white 

 flowers, the filaments and stigma very dark rosy red, anthers bright 

 orange ; sepals with long bristles, the horns in bud diverging, not 

 bristly. An occasional variety has rose-pink to very pale pink flowers; 

 this is to be called A. pinnatifida f. rosea; Coulter described it as A. 

 platyccras var. rosea. Rarely the petals are white with bright pink 

 streaks. We have had these forms in cultivation, from Texas seed. 



While collecting bees, Mrs. Cockerell obtained three species of 

 Syrphid flies, as follows : 



Volucella esuriens mexicana Macq. 



San Benito, at flowers of Parkinsonia aculcata. 



