THE CANADIAN ENTOMOLOGIST 79 



the coxic light grcN', the lips more NcUowish ; irochaiUers brownish yellow; femora 

 dark brown, paler basally; tibia^ and tarsi dark brown. Wings with a brownish 

 grey tinge; stigma dark brown, completely filling the space between r and the 

 deflection of R^ and occupying the outer end of cell Sc^\ a strong brownish tinge 

 at the origin of Rs and along the deflection of i?^+^ and r-m; less distinct seams 

 along Cii and the other veins and cross- veins; veins dark brown. Venation: 

 Sc^ ending just beyond r: Rs long for a member of this genus, strongly angu- 

 lated and sometimes spurred near origin, longer than that section of R^^^ be- 

 tween r and the dci^cction of A'," R~+^^^ \ariable in length, unusually short in 

 the type; r on R-^^ a little more than its length beyond the fork; R"^ meeting 

 R^ a short distance from the tip of the latter; cell M^ lacking; basal deflection 

 of Cu^ approximately equal to or shorter than R-^^'^'^. 



Abdomen dark brown, the extreme lateral margins of the segments paler. 

 Ovipositor horn-coloured, the valves strongly upcurved. 

 Habit-at. — Iowa. 



Holotype.— 9 , Sioux City. April 17, 1916, (A. W. Lindsey). 

 Paratopotype. — 9 . 



Type in the collection of the Illinois State Natural History Survey. 

 The specimens of this interesting crane-fly were given to Mr. Malloch by 

 the collector to whom we are indebted for this material. In its size and general 

 appearance, Dicranot-a iowa resembles D. argeniea Doane (Western North 

 America) but is readily told by the absence of cell M'^ of the wings. From the 

 Eastern species that lack this cell (rivularis O. S., eucera O. S.), it may be told 

 by the larger size, the long, angulated radial sector and the conspicuously marked 

 wings. 

 Rhaphidolabis persimilis, sp. n. 



\'ery similar to the genotype, R. teniiipes O. S., but differing \'ery strikingly 

 in the structure of the male hypopygium. 



The pleurites are stout, the proximal face near the base produced into a 

 small, slender, clavate lobe which is provided with numerous long, pale setae 

 at the tip; the proximal face of the pleurite is produced into a conspicuous, 

 flattened, strongly bifid, pincer-like blade, the outer arm slender, curved, the 

 inner arm flattened into a blade. The pleural appendages are two in number, 

 rather small, of approximately equal length; inner appendage long-oval, densely 

 set with chitinized spines; the outer appendage is flattened, broad basally, the 

 short apex bluntly rounded. The gonapophyses appear as comparatively small 

 chitinized hooks. 



Rhaphidolabis lenuipes has the appendages similar but all conspicuously 

 elongated; the flattened blade-like extension of the inner face of the pleurite 

 is here very large, almost contiguous wnth its mate of the opposite side; this 

 pale blade is subquadrate basally, the outer angle produced into a narrow, 

 slightly curved arm, the margin of which bears numerous, small, appressed 

 teeth. The pleural appendages are slender, the inner one especially so; the 

 outer appendage is broad basally, inconspicuously bifid, the outer arm pro- 

 duced into a long, slightly twisted, flattened blade whose apex is evenly rounded 

 and provided with a few small setae. The gonapophyses are similar to those 

 in R. persimilis but the recurved tips are very long, nearly equal to the stems 

 that bear them. 



