Xo. ()4| DIPTERA OF COXXF.CTICUT : TAXONOMY 365 



(June: Aug.. Sept.) Que.. X. B., Me., N. H.. Vt., Alass., X. Y.. westw. to Mich., 

 southw. to Md. 



Connecticut.— P:. Hartland, Sept. 11, 1928 (C. P. A.)- Xurtolk Sept <> 19^8 

 (G. C. C); W. Granby. Sept. 11. 1928 (C. P. A.). 



HeXAT;)M1XI 



In the local fauna, the tribe Hexatoniini incliules ei«rht siibtiibes 

 that are readily tohl from all other Limoniinae, with the exception of 

 the Pediciiiii, by the presence of spur.s on the tibiae. All but two of 

 these subtribes, the Atarbaria and the Elephantomyaria, are further 

 separated from the Linioniini and aberrant Erioptei-ini {To.rorh'nm\ 

 Gonomyia; Teucholahis) by the presence of three l)ranches of Ra 

 reaching the win<>-mar<rin. Many of the included «renera have cell 

 M] of the wings present, a character found in but two of the re<iional 

 genera of Eriopterini (Cladura, Neol'rinnoph/la). The divei-se habits 

 of the adidts and larvae of the various sul)ti'il)es are indicated under 

 the various groups. 



After this manuscript was completed, a surjH-ising acKlition to the 

 tipulid fauna of eastern North America was made l)y the discovery 

 in the White Mountains, New Hampshire, of l*hi/IIoI(ihis 1a(j<ia>i(iis}s 

 Alexander, ])reviously known only from Alberta. The geiuis PJuillo- 

 Jahts I'uns to couplet 10 by the use of the acc()m))anying key to the 

 hexatomine genera. It is readily told from all others in our fauna by 

 the loss of vein lij, and the position of m-eu clo.se to the extreme outer 

 end of cell 1st il/o, the latter character being nnich as in the family 

 Trichoceridae. The species, lagganensis^ is of medium size, (hirk-col- 

 ored, with unmai'ked wings. The specimens were secured in late Au- 

 gust, 1935, at high altitudes on Mount Madison. (Occas. Pap. Bos- 

 ton Soc. Nat. Hist., 8: 275-2TG, fig. 3; 1936). 



Key to Subtribes and Genera 



1. Antennae with not more than 12 segments (Hexatomaria) Hexatoma V'3 



Antennae with more than 13 segments 2 



2. Rostrum elongate, exceeding one-half the length of the entire body (Fig. 



46, L) (Elephantomyaria) . Elephantomyia 



Rostrum short, or of moderate length only, not exceeding in length the 

 remainder of head • • • ^ 



3. Wings with two branches of Rs reaching the margin (Fig. 44, O) (Atar- 



baria) Atarba 



Wings with three branches of Rs reaching the margin (Fig. 44. A-E, L. 

 N) ,■ ^ 



4. Apical cells of wing with macrotrichia (Figs. 43, A, B, J, K : 44, 1 ) 5 



Cells of wings without macrotrichia (excepting in stigmal area) 7 



5. Cell Rz of wing (Fig. 44, I) sessile or subsessile; in local species, cell .Ui 



lacking and the macrotrichia involving cells basad of cord Ulomorpha 



Cell Ri of wings petiolate ; cell Mi present, rarely lacking, in the latter case 

 {Oxydiscus cayuga, Fig. 43, B; Limnophila subtennieornis, Fig. 43, K) 

 withmacrotrichia confined to extreme apical cells of wing 6 



6. Small species (wing less than 5.5 mm.); antennae short !n both sexes 



(Oxvdiscaria) (Fig. 43, A, B) ...Oxyd.scus 



Larger species (wing over 6 mm.) ; antennae of male elongate (Limimphi- 

 laria, part) (Fig. 43, J, K) Limnophila: Lasiomast.x 



7. A supernumerary crossvein in cell C (Fig. 43, C) (Epiphragmaria) Epiphragma dh«^ 

 No supernumerary crossvein in cell C '^ 



