118 Journal New York Entomological Society, t^oi. xxiv, 



higher in the late afternoon. On Aug. 22, 1911, Aug. 12, 191 2, and 

 Aug. 16, 1914, two sorties occurred on the same day. This has also 

 been occasionally observed by Forel in the field. On Aug. 9, 1914, 

 there were three sorties, but the time of their occurrence was not 

 recorded. 



NEW LIMNOPHILINE CRANE-FLIES FROM THE 



UNITED STATES AND CANADA 



(TIPULID^, DIPTERA). 



By Charles P. Alexander, 



Ithaca, N. Y. 



The tribe Limnophilini of the subfamily Limnobinse, in the Nearc- 

 tic fauna, includes a considerable number of species placed in a rela- 

 tively small number of genera. During the past few years a number 

 of interesting forms have accumulated in the collection of the author 

 and these are described herewith ; I am greatly indebted to Mr. C. W. 

 Johnson, Mr. Frederick Knab and Mr. W. L. McAtee for the loan 

 of this and other material sent me for study. 



Limnophila marchandi, new species. 



Allied to L. alleni ; color of the thorax gray; ground color of the wings 

 hyaline ; basal abdominal tergites gray with prominent setigerous punctures. 



Female. — Length, 30 mm.; wing, 20 mm.; Middle leg, femora, 10 mm.; 

 tibiae, 8.7 mm. ; tarsi, 8.6 mm. 



Rostrum short, dark brown, palpi dark brown. Antennae with the two basal 

 segments dark brown, the flagellum light brown ; first scapal segment elon- 

 gated ; segments of the flagellum short, gradually narrowed to the seventh 

 segment of the organ beyond which the segments are very slender and atten- 

 uated. Head dark brown, the margin of the vertex adjoining the inner 

 margin of the eye, paler, more yellowish ; head narrowed behind. 



Pronotum light brownish gray, clearer gray on the sides, with a delicate 

 impressed median line ; scutum with numerous long hairs whose bases are 

 surrounded by brown spots. Mesonotal praescutum clear light gray with three 

 dark brown stripes ; the middle stripe is broad, the median area is paler 

 brown and narrowly bisected by a very delicate dark brown median line 

 which runs the length of the sclerite ; the middle stripe does not attain the 

 transverse suture ; lateral stripes short, crossing the transverse suture onto 

 the scutum ; the pale area between the lateral and middle stripes is lined with 

 a paler shade of brown ; sides of the sclerite bearing abundant long pale 



