434 COXXECTICUT GEOL. AXI) XAT. HTST. SURVEY [Bull. 



2 Cell Rs very small, its extent alons;- costal margin subequal to that of cell 



R. (Fig. 47. H) r Lipophleps (part) 



Cell R.i large, its extent along costal margin much greater than that of cell 



R.> (Fig. 47, I-K) .^ o 



3. Wings with m-cti about its own length before fork of M (Fig. 47, I)..ldiocera 

 Wings with ,11-cii at or clo.se to fork of M (Fig. 47, J, K) Gonomyia 



Siib<j:eiHis Lipophleps Beroioth 



1889. Leiponeuia Skiise; Proc. Linn. Soc. Xew South Wales, ('2) 



4 : 795 (preoccupied) . 

 19ir). IJpophleps Bergroth: Psyche, '22:55. 



I am foUowin^- Edwards iu includinji- m this .suljo-enus not only 

 all re<j;-ional species of Gonom]ihi having two branches of Rs^ but also 

 those forms having three such branches, in which cell R:>, is very small 

 and evidently tending to be lost by fusion of adjoining veins (Fig. 

 47. H). In our fauna, this latter group includes only sulphurella. 

 The male antennae of members of this subgenus have exceedingly 

 elongate verticils on the, antennal flagellum. 



Kc\' to Sfccics 

 (Based in part on male characters) 



1. Wings with three branches of Rs reaching the margin, cell Rs being pres- 



ent (Fig. 47, H) sulphurella 



Wings with two branches of Rs reacliing the margin, cell R■^ being lost by 

 fusion of enclosing veins (Fig. 47, F, G) 2 



2. Legs with tibiae snowy-white: wings wilh cell 1st M2 open by atrophy of 



basal section of Ms (Fig. 47, F) ; costal margin china-white alexanderi 



Legs without white on tibiae; wings with cell 1st M2 closed (Fig. 47, G) ; 

 costal margin brown or yellow 3 



3. Wings grayish brown, the costal border broadly light sulphur-yellow ; stigma 



pale brown, preceded and followed by yellowish areas : abdominal seg- 

 ments brown, narrowly ringed caudally with yellovy sacandaga 



Wings with the costal border concolorous with remainder of wing or nearly 

 so, where more brightened, the stigma conspicuously dark brown ; ab- 

 dominal segments uniformly darkened, or else pale with narrowly dark- 

 ened incisures 4 



4. Stigma very conspicuous, dark brown : femora with a darkened nearly ter- 



minal ring (extra-limital) pleurajis 



Stigma lacking ; femora uniformly brown 5 



5. Thoracic pleura pale, only slightly if at all striped with darker; male hy- 



popygium with the dististyle entirely fleshy, terminating in a single fas- 

 ciculate seta (Fig. 49, A) '. .' manca 



Thoracic pleura with the ground-color dark, striped longitudinally with pale 

 yellow ; male hypopygium with the dististyle a blackened curved hook, 

 the.se of different sizes on the two sides of body (Fig. 49, B ) puer 



Gonomyia {Lipophleps) alexanderi (Johns.) (Fig. 47. F). 

 1912. EUipjtera alexanderi Johnson; Psyche, 19:3. 

 191(). Gonomyia {Leiponeuia) alexanderi Alexander: Proc. Acad. 

 Xat. Sci. Philadelphia, 1916 : 513-514. 



Figs. — Johnson, Ihid., 19:3, fig. 6 (ven.) ; 1912. Alexander, /in'rf., pi. 26, fig. 17 

 (wing) : pi. 29, figs. 59, 61 (hyp.) ; 1916. Alexander, Cfls. N. Y., 1, pi. 36, fig. 86 

 (wing) ; 1919. 



Fore femora black ; mid-femora yellow, the tips conspicuously 

 ]»lackened: hind femora vellow. with a narrow brown subterminal 



