ART. 10. NEW SPECIES OF THE FAMILY TIPULIDAE ALEXANDER. 5 



about equal to the fii'st section of R^ and a little longer than the 

 deflection of R^^r,; basal deflection of Cu^ at the fork of M; vein 2d A 

 feebly sinuous, longer than usual in this group, ending beyond 

 midlength of Rs. 



Abdomen dark brov,^n, sparsely pruinose; hypopygium concolorous. 

 Male hypopygium with the ninth tergite appearing as a very large 

 and flattened plate as in this group of species, the apex with a broad 

 V-shaped notch, the lobes rounded. Pleurites comparatively stout, 

 the ventral apical angle produced caudad into a fleshy lobe that is 

 clothed with pale, erect setae; outer pleural appendage a slender, 

 nearly chitinized arm that tapers to the acute apex, the outer or 

 lateral margin microscopically squamulose; inner pleural appendage 

 shorter, deeply bifid, the lateral arm a chitinized, strongly curved 

 hook, the mesal arm pale yellow, straight and slender, terminating 

 in a single powerful seta, the cephalic margin of the aim with a 

 slight, wing-like expansion. Gonapophyses appearing as small, 

 flattened plates, the mesal margin straight or nearly so, the apices 

 obhquel}^ sub truncate, the lateral margins rounded. Penis-guard 

 a Uttle longer than the apophyses, the apex strongly curved. 



Described from a single male, collected at Valdez, Alaska, June 8, 

 1921 (J. M. Aldrich). 



Type.— Male, Cat. No. 26082, U.S.N.M. 



A female taken on the same day, at the type-locality, may belong 

 here but the second anal vein is short and straight as usual in the 

 group, ending before one-third the length of Rs. 



Tliis interesting crane-fly is dedicated to the collector, Dr. J. M. 

 Aldrich. It is possible that this group of crane-fhes ma}' more 

 correctly be referred to the genus Psiloconopa Zetterstedt. 



ERIOPTERA ALASKENSIS, new species. 



Allied to E. angustipennis Alexander; halteres pale yellow; wings 

 long and narrow; male hypopygium reddish brown; outer pleural 

 appendage of the hypopygium dilated apicaliy into a broad, trian- 

 gular blade; inner appendage a straight arm, the narrow blackened 

 apex with one seta; gonapophyses slender, straight, the slightly 

 enlarged tips with abundant short setae. 



Male. — Length about 4.8 mm.; wing, 6 mm. 



Rostrum and palpi dull gray. Antennae black, the basal segment 

 gray pruinose. Head gray. 



Mesonotal praescutum dull gray with four brown stripes, the 

 lateral pair subobsolete; pseudosutural foveae very conspicuous, 

 black; tuberculate pits likewise conspicuous, black; scutum dull 

 gray, the centers of the lobes weakly infuscated; scutellum dull 

 gray; postnotum brownish gray. Pleura dark, heavily yellowish 

 gray pruinose. Halteres pale yellow. Legs with the coxae and 



