160 NEW YORK STATE MUSEUM 



one fourth shorter than the tibia; fore tarsi of the male bearded. 

 Halteres whitish. Wings slightly hairy, hyaline, slightly smoky 

 near the tip; the crossyein brown clouded; the cubitus forking 

 distad of the crossvein; venation resembling that of P. n e r v o - 

 sus (pl.37, fig.24). 



The female is usually somewhat lighter colored. Length 3.5 to 

 4.5mm. Translation from V.d. Wulp (1877). "Coloring some- 

 what variable." Schiner (1864). North America (Osten Sacken, 

 1878). 



6. Tanypus tibialis Say. 



1823 T a 11 y p u s Say. Joui-d. Ac. Nat. Sc. Philad. 3 : 15, 2 

 1828 Tanypus Wied. Ausser. Europ. Zw. Ins. 1 :20, 4 

 1878 Tanypus Ost. Sack. Catl. Dipt. N. A. p.22 



Thorax reddish brown ; tibia white at base ; abdomen white, a 

 double band on the middle and tip black. Habitat : Pennsylvania. 



Wings immaculate; poisers white; feet fuscous, basal half of 

 the tibia white; tergum, second joint with a spot each side, two 

 middle segments with each a band, of Avhich the anterior one is 

 much broader, and terminal segments deep fuscous, pleura yellow- 

 ish. Length of male more than 1/20 in. 



7. Tanypus baltimoreus Macquart 



1855 T e r n i p u s Macq. Dipt. Exot. SuppL Y. 15, 1 

 1878 Tanypus Ost. Sack. Catl. Dipt. N. A. p.21 



Female. Palpi tawny, shining cinereous. Antennae wanting. 

 Thorax with wide black bands ; abdomen black, posterior margins 

 of the segments white. Legs tawny ; tarsi dusky. Halteres brown. 

 Wings greyish, with an oblique bllack line; veins normal. Length 

 3.5 mm. From Baltimore. Translation. 



Judging from the description this species seems to resemble 

 T. ic u 1 i c i f o r m i s , but it has brown halteres. Nothing is 

 said either about the wing venation with respect to fork of the 

 cuibitus, whether sessile or petiolate ; or whether the wing is hairy 

 or bare; it is therefore impossible to say to which one of the 

 four genera of the group Tanypus it belongs. 



Genus 20. Pentaneura Philippi 



Verb. z. b. Ges. 35. 629. 1865 



The antennae equal in length to the head and thorax taken 



together, moniliform, 12-14 jointed, verticillate with long hairs, 



the joints suhglobose, not petiolate, the last joint elongate. Palpi 



elongate, equaling the antennae, joints suibcylindrical. Wings 



