mil I'O.MIINA .ImUNAI. lir ICNTOJIOI.OliY AM) ZoDIOliV, Vol.. \I, No. I, .Maiuii 



T\\c HioloLj'N' of the North American 



Ci a I le - b' H es { Tip u lidce, 



Dipt era) 



1. ii 1 1; ( ; i-:x rs erioceua macquaet 



f. 1'. .VLK-XANDI-.H .VND J. T. LLOYD 

 ITHACA, N. Y.* 



iNTROnUCTION 



Tlie trilio IlrxdloinUii, one of the ten sections into wliicli the 

 Tipnlid flii's have l.ccn <livi,lc.l. is wi.loly .listriliulo,! in the 

 nortli tcnipcrato ami tnn-i<i /.oiu^s. Tlio dominant -■ciins is 

 /■;/■;», r/-,/,.-niitainin- nearly one linmlre,! descrihed species, most 

 of wliicii are tropical I'orms. Xo species liave l)eeu described 

 from I'lni-ope or the Anstralian region Init elsewhere the genus 

 is represented by a host of i'orms, tlie number of species be- 

 coming less as one goes north or south from the equator. The 

 males of many of tlie species have tlie antennae exceedingiy 

 elongated, extending backward twice the length of the body. 

 The wing-coloration in the northern forms is sober, undiversi- 

 fied, but in the ti-o|>ics the wings of man\' species take on a 

 banded or spotted apjiearance that is iiuite uiii)arallel(i(l in any 

 other group of crane-flies. 



The immature stages of this reinai'kable group of insects 

 wei-e (piite unknown hitherto. \'an K'oser I \'er/.eic]i.-AVuerttem- 

 ber-. Dipt., pt. 1. p. L'(i'J) states that the larva' of Ucnifoiini 

 {=A)ns,niirr(t of authors) live in the sand along the banks of 

 streams. 



The niembei's of this ti'iiie of insects seem to be easily recog 

 ni/.ed in all stages. The adult flies, although closely resembliug 

 the Liiiiiinphirnii in venation, liaxc the mininmm immber of 

 antennal seginents for the family, there being but six of these 

 segiuents in Hcvatinini and not more than ten elsewhere in the 



•Contribution from the Eiitomologic.il I,:ilior,itory of Cornell rniversity. 



