MAY FLIES AND MIDGES OF NEW YORK 155 



24. Ablabesmyia nigropunctata Staeger. 



1839 T a n y p 11 s Staeger. Krojer ; Nat. Tidsskr. 2 :589, 16 

 1850 Tanypus Zett. Dipt. Scand. 9:3624 

 1864 Tanypus Schiner. Fauna Austr. 2 :621 



Male and female. Wliitish ; antennae pale ; eyes black. Thorax 

 in dried specimens yellow, in life with a reddish tinge; dorsal 

 stripes pale; sternum and metathorax yellow; scutellum white. 

 Abdomen whitish, slender in the male, pilose, the last three 

 segments a little wider, each segment with a brown, basal trans- 

 verse fascia on dorsal surface, venter spotless; anal appendages 

 white. Abdomen of the female stouter, pubescent, spotless. 

 Wings white^ spotless; hatleres white. Legs white; fore meta- 

 tarsus about one fourth shorter than its tibia. Fore legs of the 

 male without long hairs. Pullman, Washington. 



25. Ablabesmyia (?) sp. 



A larva from Beebe lake, Ithaca, N. Y., is yellow; 5 or 6 mm. 

 long ; resembles P. adumbratus in having a short head, com- 

 paratively short antennae and in shape of the mandible; but 

 differs in having but four marginal teeth in the labium (pi. 19, 

 fig.5) and in having rather more slender marginal claws in the 

 posterior feet. 



Genus 18. Isoplastus Skuse. 

 Proc. Linn. Soc. N. S. W. p.279. 1889 



Antennae in the male 15-jointed, in the female 12-jointed. 

 Wings pubescent. Marginal crossvein (R^) ^^^ second longi- 

 tudinal vein (Rg) pale and indistinct. Fork of the cubitus with 

 its base at base of M-Cu. crossvein. 



This genus was erected to contain several Australian species. 

 It may later be found that this genus can not be separated from 

 Ablabesmyia in which case the name Isoplastus has 

 precedence. 



Genus 19. Tanypus Meigen. 

 Illiger's Magaz. (part.) p.261. 1803 

 One of the subdivisions of the old genus Tanypus of 

 Meigen. Wings hairy; cubitus forks distad of the M-C^. cross- 

 vein, and is therefore petiolate. 



Skuse (1889) gives the name Tanypus to the gToup having 

 hairy wings and the fork of the cubitus sessile; but since Meigen 

 gave the species cinctus (=punctipennis)as the repre- 

 sentative of the genus, and since it possesses a petiolate cubitus^ 



