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Show 280 INSECTA. BAooHA, Meig. Fab. Another subgenus closely allied to the preceding, only differing in the abdomen, which is proportionally longer, narrowed at base, and terminated in the manner of an elongated club. To this subgenus, in my opinion, should be referred the Syrphus ( Screva, Fab.) conopseua of Meigen, although the palette of the antenore is less orbicular than in Baccha( 1 ). · We now pass to other subgenera, similar to the preceding ones, as to the form of the snout and the seta of the antennre, but in which the length of these organs is at least equal to that of the face of the head. Here, the antennre are not placed on a common pedicle, and their length does not surpass that of the head. PARAGus, Lat., Meig.-Mulio, Fab.(2) Here, they arise from a common eminence, and are longer than the head. Sometimes the seta is lateral. SPHEOOMYIA, Lat. Where it is inserted on the second joint; the last is much shorter than the two others, than the first in particular, and almost ovoid; the latter and the second are long and cylindrical. I have established this subgenus on an Insect taken in Carolina by the late M. Bose. PsARUS, Lat. Fab. Meig. Where the seta of the antennre is inserted on the back of the third joint, near its extremity; this joint almost borders on an oval, and is nearly of equal length with the second; the first is much shorter. The common peduncle is proportionally higher than in the analogous subgenera. The wings are incumbent(3). (1) Meig., Ibid. (2) See Latreille and Meigen. (3) Idem. DIPTERA. 281 CHRYSOTOXUM, Meig.-Mulio, Fab. Where the seta is also inserted on th . . . this joint is the longest of 11 d e tlurd JOmt but near its base· tri·a ngle; the two others are a I ' an forms a narrow and elongated' distant( 1 ). a most of equal length. The wings are .sometimes the seta, always thick an . mmates the antenn~. d 10 the form of a stilet, ter- CERIA, Fab, Where the body is ova) elon the second joint of the an; g.ated, and resembles that of a Wasp· forms with it a fusiform cle~nce. I~ of equal length with the last, and is long and cylindrical .;h WI~ a very short stilet. The abdomen ri•o r ce 11 of the posterio• r m e .w mh gs are very remote, and the •e xte- I.n t he outer edge( argm as a well m k d 2). • ar e re-entering angle CALLIOERA, Meig. Where the body, shorter, wicter and . pearance of that of th Silky, has the general ap e common Fly The d . • tennre, shorter than the last ~ : . secon JOint of the an-fusiform and slightly arcu;teo;:~u~~th It an el?n~ated, compressed, elongated stilet. the fir t . . . ' the seta ls m the form of an The exterior ce{l of the s JOtiD't IS longer than the following one m· I. ts s.t des(3). pos er10r margin ex hI'b l' ts no emargination• . Th e nasal tubercle which distin . disappears in the folJowing one ~~Ishes the preceding Syrphidce, always simple. The wing s.. le seta of the antennce is almost ~he first are connected ;i~~e t~cu~bent~ one on the other. their antennce. Those or e pi ecedmg on~s by the length o£ second joint, the shortcs~a;:; :~~ ~Iosely a~proxtmated at base; the and elongated club· the set . .' orms, With the thit·d, a narrow th I e atte1•. ' a IS simple and m· serte d near the base of (1) Item. (2) See Fab L t M . (3) See Lat .,Ma' ., exg. and Wiedemann. ., eJg. VoL. IV.-2 L |