1880] 33 



basal joint of all the tarsi beneath, as well as a line under the four anterior tibiae, 

 golden-rufous ; apical joint of all the tarsi dark piceous, joints two to four paler ; 

 posterior coxae with a short curved spine at the tip, within ; posterior tibiae sub- 

 triangular, the lower face produced at the apex into a three-toothed process, the 

 exterior tooth the longest, and forming a spine, the middle tooth shortest, blunt ; 

 calcaria whitish, the point of the anterior calcaria not so long as in the female, the 

 posterior calcaria unusually remote, arising from the bases of the outer teeth of the 

 process, the exterior tooth about two-thirds the length of the corresponding spur ; 

 the lower face of the basal joint of the posterior tarsi flattened, expanded within 

 and glabrous. Abdomen shining, clothed with a scattered white pubescence, which 

 is more dense on the sides, the depressed apical margins of the segments polished, 

 the apical margins of the third and the four following segments with a narrow white 

 fringe, that on the third segment interrupted, on the fourth slightly interrupted. 

 Abdomen beneath very smooth, the apex of the third and fourth segments with a 

 single, slightly arcuated, row of golden hairs, the end of each hair regularly curved ; 

 the apex of the fifth segment with a similar, but less regular, row of hairs ; the 

 visible portion of the sixth segment forming an angle with the concealed portion, 

 triangular, the two posterior sides margined with a short dense golden pubescence. 

 The exterior clasps of the forceps expanded and deeply emarginate at the tip. 



Described from five specimens taken at New Haven, Ct., on the 

 flowers of Bubus villosus, June 22nd ; and one specimen taken at 

 "Waterbury, Ct., on the flowers of Comus paniculata, July 4th. 



Macropis patellata, n. sp. 



<J . Differs from M. ciliata, $ , in the following particulars : — 

 Joints five to twelve of the antennae each slightly shorter than joints three and 

 four taken together, making the antennae as a whole slightly shorter than in ciliata. 

 Labrum yellow. Base of the tibiae with a yellow spot externally, which, in the 

 posterior legs, extends upon the tips of the femora. Ciliation of the ventral segments 

 white. The process at the apex of the posterior tibiae represented by the exterior 

 tooth only, forming a stout, obliquely-truncated, projection, reaching to the middle 

 of the exterior spur ; the calcaria not so remote as in ciliata ; the lower face of the 

 basal joint of the posterior tarsi slightly sinuous within, but not expanded. Exterior 

 clasps of the forceps broadly cleft, forming two narrow lobes. The retracted ventral 

 segments present other distinctions. 



Taken by Mr. H. F. Bassett on the flowers of either Cicuta or 

 Rhus at Plymouth, Ct., August 1st ; and by me on Lysimachia ciliata 

 at Waterbury, Ct., July 9th. 



A female specimen taken with the males differs from the typical 

 females of M. ciliata in no respect, except that the fimbria on fifth 

 segment of abdomen has a golden tinge and the tegula3 are dark 

 piceous. 



As the males of ciliata and patellata differ in those characters only 

 which are peculiar to that sex, it seems not unlikely that the females, 



