THE CANADIAN ENTOMOLOGIST 163 



gray pruinose; trocanters testaceous; femora dark brown, pale basally, with 

 three narrow white annuli ; tibiae with four black and four white aniiuli arranged 

 alternately, the latter a little narrower than the former, the apical band white; 

 metatarsi black, the intermediate third white ; second tarsal segment white, the 

 apex and remainder of tarsi black. Wings whitish subhyaline, the basal third 

 more grayish; a faint gray suffusion beyond the cord; a narrow dark brown 

 seam along the cord, small brown clouds at h, arculus, origin of Rs, Sc.^, Sc ^ , 

 tips of the longitudinal veins at the wing-margins ; a brown cloud at the fork 

 of M^ plus Cm,, and a conspicuous mark near the wing-base behind vein Cu; 

 veins pale, darkened in the infuscated areas. Venation : as in the atmulipcs group ; 

 a conspicuous spur near the tip of the strongly sinuous vein 2nd A as in 

 E. cladophora. 



Abdomen brown, the sternites paler. Male hypopygium with two pleural 

 appendages, the outermost profoundly bifid, the outer arm similar to the inner 

 arm but a little shorter, both arms acicular ; inner pleural appendage a slender 

 chitinized arm that narrows to the acute blackened point. Gonapophyses slender, 

 the tips blackened and slightly incurved. 



Habitat — Argentina. 



Holotype, ^, La Plata, October 13. 1920 (C. Bruch). 



Allotopotype, $. 



Paratopotypes,, 7 ^^ ^, October 13-18, 1920. 



Type in the collection of the author. 



Molophilus cladocerus, sp. n. 



Related to M. honcstns Alexander; pleural appendage of the male 

 hypopygium heavily chitinized. slightly beyond midlength forking into two 

 subequal acutely pointed branches. 



Male. — Length 4 — 4.2 mm. ; wing 4.5 — 5 mm. 



Pemale. — Length 5 mm. ; wing 5.5 mm. 



Rostrum and palpi brown. Antennae comparatively siiort, brown. Head 

 light yellow. 



Mesonotum light yellowish brown, unmarked with darker ; lateral mar- 

 gins almost white ; postnotum darker brown. Pleura testaceous, the dorsal 

 region dark trown, continued to the postnotum. Halteres yellow. Legs with the 

 coxae and trochanters yellow ; remainder of the legs dark brown, the femoral 

 bases yellow. Wings with a strong yellowish tinge ; veins pale brown, those in 

 the costal region more yellowish. 



Abdomen pale brown ; hypopygium yeIlow^ Male hypopygium with the 

 apparent ventral appendage heavily chitinized, at a little beyond midlength 

 branched, the inner branch only a little shorter than the outer or principal 

 branch, both branches gradually narrowed to the smooth, acute points ; remainder 

 of the hypopygium almost as in M. honestus. 



Habitat. — Argentina. 



Holotype, J*, Arroyo FamaiUa, Tucuman, altitude 400 meters, October 

 18. 1920 (V." Weiser). 



Allotopotype, % October 12, 1920. 



Paratopotypes, J* $. 



Type in the collection of the author. 



