158 NEW YORK STATE MUSEUM 



the median one posteriorly, the kxteral ones anteriorly abbreviated, 

 and the median one is divided by a fine line; the intermediate 

 space and the lateral margins have some erect yellow pile ; scutel- 

 luim and metanotum black; abdomen slender, cinereous black, 

 with long yellow pile, claspers quite large, pilose. Antennae 

 blackish ibrown; legs more or less dilutely brown. Hal teres 

 sordidly yellow. Wings hyaline, distinctly but not densely hairy, 

 the costal vein brown, the others pale, the cubitus forks far distad 

 of the M-Ou. crossvein (pl.37, fig.20). The second and third pairs 

 of legs with long pile, the first pair bristly, the fore metatarsus 

 a little more than half the length of its tibia. Male. Length 2 

 to 3.25 mm. 



The female is shorter than the male, stouter, the antennae 

 shorter than the thorax; in other respects like the male. North 

 Greenland. 



3. Tanypus crassinervis Zetterstedt 

 1838 Tanypus Zett. Ins. Lappon. 817. 1 

 1845 Tanypus Zett. Staeger. Nat. Tids. p.354 

 1850 Tanypus Zett. Dipt. Scand. 9:3599 

 1898 Tanypus Zett. Lundbeck. Vid. Med. p.294 



Black, opaque, halteres Avhitish, lateral margin of the thorax 

 ferruginous, antennae brown, wings white, somewhat hairy, 

 anterior veins conspicuous, crossvein infuscate, Rg present, the 

 fork of the cubitus petiolate; legs blackish or fuscous, fore tarsi 

 bare, metatarsus about one fourth shorter than the tibia. 

 Length about 4 mm. 



Male and female. Resembles P. m e r v o s u s (an European 

 species) but is a little smaller, the body opaque, not shining, the 

 wings with pale hairs, and the legs unicolored. 'Head black; 

 antennae dark, the hairs (in the male) brownisih; palpi dark, 

 thorax black, lightly cinereous shining, dorsum of the thorax in 

 the male Avith a lateral ferruginous stripe, the humeral spots 

 sometimes more distinct; in the female often reddish yellow, with 

 three wide black stripes, the lateral ones abbreviated anteriorly. 

 Scutellum and 'metanotum black. Abdomen black, in the male 

 pilose, genitalia small, ovate; abdomen of the female pubescent. 

 Wings white, slightly hairy, anterior veins distinctly fuscous, 

 crossveins more deeply infuscated, the posterior veins distinct 

 but paler. Venation as in P. nervosus (pl.37, fig.24). Legs 

 formed as in the latter, sometimes brown, sometimes fuscous 

 testaceous. An European species, also recorded from Greenland 

 by iStaeger (1845) and Lundbeck (1898). 



4. Tanypus culiciformis Linne 

 1767 T i p u 1 a Linn. Syst. Nat. ed. XII. 2 : 978 

 1805 Chiron omus Fabr. Syst. Antl. 47, 44 



