50 THE CANADIAN ENTOMOLOGIST. 6944 CEdionychis 6-maculata, ///. Found this species abundant on one occasi6n while sweeping with a net in a weedy swamp, July 8. Could not determine what plant. 7070 Microrhopala porcata, Mels. One specimen taken while beating. 8677 Orchestes niger, Horn. Swept from weeds in June, three years in succession. Never found it prior to 1890. W. H. Harrington mentions this species among those found at Ottawa. 8956 Euchgetes echidna, Lee Rare, one found on elm. This speci-men is in Mr. Reinecke's collection. 9213 Eusphyrus Walshii, Z(?(r. Not rare, found on dead basswood. A VERY REMARKABLE AND ANOMALOUS SYRPHID, WrrH PECULIARLY DEVELOPED HIND TARSI. BY C. H. TYLER TOWNSEND. In a lot of flies sent me from Illinois, by Professor S. A. Forbes, I find a most remarkable species, which I am satisfied must be located in the Syrphidce, thougn the wing shows no sign of the spurious vein, and the first posterior cell is open. The third antennal joint bears a terminal arista, which character is shared by only two previously known North American genera ; but the remarkable character of the fly lies in its hind tarsi. These are most abnormally developed, probably only in the $ sex, and might well be taken for monstrosities, did they not fully correspond with each other, I regard this as a secondary sexual character. This syrphid will probably demand the erection of a separate tribe for its reception, its venation being radically different from both Pelecocera and Ceria, the two genera above referred to as possessing a terminal arista. The wing and hind tarsus are figured in outline, merely to give a more correct idea of the characters of this peculiar fly. On account of its elaborately developed hind tarsi, I propose the name Calotarsa for the new genus. Calotarsa, nov. gen. Rather small, cinereous or blackish with yellow bands on abdomen, the latter thinly pilose. Eyes contiguous in $ for fully ^^ distance from ocelli to base of antennae, bare, extending on sides nearly to oval margin. Ocelli situated on vertex. Antennae small, all three joints short, the
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