JOURNAL OF ENTOMOLOGY AND ZOOLOGY 109 



swnmi.y wn.xls suppniliiii;- ;i (';i iijK ii;i 11 r.-iuna ami Wnv.i. In 

 Fultdii r.Minty. X. ^■., I have taken I he Innii in llic -ui-o-,. ,,r th,. 

 Cayudutta <'i-cck at .loliiistdwii oii .liiiic 1."). 'UD. whirh is the 

 carlifst ilatc Inr tlic .•ounty. At .M.Miiitaiii Lakr ho- |m,ihI l.,.tli 

 sexes were Iniind in alimnk-iiice on .linie -JC. "d'.l. At \'an(leii- 

 liui--s iM,n,l ,,n June l:i. l:Ml. I Unuul the insei^t in niunl.ers 

 and a livin- female pla.-ed in a vial with a male I'halanucn-a 

 t'lpulnKt was taken in e(i|iulati(in at imee an<l remained "in eoitii" 

 for several lioui-s. 'I'he last speeiniens for the year in this edunty 

 were found at Saeandaga Park on dune J7. IKll. As Ave 

 approaeh the southern limit of their ran-e they prohahly emer-e 

 in late April oi-eai'ly May. ( llazieton. I'a.. dune S, 'III; Wooster, 

 Ohio. May ;;i. 'IL': i'.laek Mountain^, l>.une,,mlie county. X. ('., 

 .May L':i. -Vl). The adult iuse.ls are slu,--ish and do not tly 

 readily and the\- may he swept from the \-e,-elation that sur- 

 rounds theii- haunts. 'I'hey fre(|uent the rank -rowth around 

 small shailed jiouds whei'e tliey occur with numerous other 

 erane-tiies of the Canadian fauna. W ltha<'a. this form is most 

 common in the ,i;-or-es and on the moist shade.l hillsides to 

 wliieh little sunlight peiietiates. 



I am indebted to the followin-- persons for the data on the 

 li-eo.iiraphical (list rihut ion id' the adult flies: .Mr. ( '. W. Johnson, 

 Ml-, ^r. ('. \"anl)u/.ee, .Miss ('. J. Stauwood, Dr. W. V,. J)ietz, and 

 :\Ir. J. 11. llouser. And to Dv. Xeedliam and :\Iiss Tutlle for 

 kind help iu the securing- of t lie inuuature stages. 



This work lias been done in the Liimiological Lahorator\- of 

 Cornell Ciiiversity niider the direction of \)y. Xeedliam. to whom 

 my thanks are due for kind suggestions c(mcei-ning many points. 



A Kkv 'Xo thk Known I.,akv.k ok tiik Cvlixdhotomini 

 1. liody appendages long, iiliforni; a(|uatic or nearly so on 

 FoiifiiKiUs aiifipijrctica, IIi/piiKiii clodvs, II. exauHulatum, 

 Iianu)HuUt.s fiuihnis, etc. 

 (Palearctic) I'luildcroccra repUctita L. 



Body appendages shorter, leaf like. 2 



•J. Dorsal api)en(iages all simple; terreshial on I'/,,/,; hiflont 

 W. Strlhiria uviixn-.di.-.. Anvtn,,,!, iirinn,ns,i, et<-. 

 (Palearctic) ('ijluidrototna distbictif;sh)Ki Meig. 



Some of the dorsal appendages bearing- teeth on the anterior 

 convex side. 3 



