MAY FLIES AND MIDGES OF NEW YORK 195 



11 The fore metatarsus less than 1.4 times as long 

 as its tibia 

 in Yellow or whitish species 



n Deep yellow species ; female with greenish 

 tinged abdomen; male with brown abdom- 

 inal fasciae ; fore metatarsus about IVs 

 times as long as its tibia ; length 4 to 



5 mm 44. fulviventris n. sp. 



nil Species with white or very slightly green- 

 tinted abdomen ; thorax testaceous ; knees 

 blackish, fore metatarsus about 1.25 times 

 as long as its tibia; length 4mm. (See 



also No. 54) 45. p a 1 11 d u s n. sp. 



mm Green species 



n Joints of the legs each with a moderately 

 wide black apical band ; fore femora and 

 fore metatarsus of about equal length and 

 each about 1.33 longer than the tibia 



46. f r e q u e n s n. sp. 

 nn Joints of legs without distinct black apices 

 Wove femora and tibiae of equal length ; 

 fore metatarsus about 1.33 times as long 

 as the tibia ; fore tarsi of male hairy 



47. V i r i d 1 s 

 00 Fore femora noticeably longer than the 

 tibiae ; fore tarsi of male bare 



48. dux n. sp. 

 gg Abdomen bicolored, each segment with crossbands or 

 marked incisures which may be light or dark, yellowish 

 or brownish 

 Ji Thorax with wide black stripes 



i Species over 7 mm. in length ; thorax green or greenish 



yellow in ground color ; thoracic stripes shining ; 



legs yellowish, knees, fore tibiae, and tarsi in part, 



blackish; crossvein clouded. .. .49. viridicollis 



ii Species 5 mm. or less in length 



;■ Thorax reddish with black stripes ; scutellum black, 

 abdomen yellow and black ; legs and antennae yel- 

 low ; length 5 mm. ; male 50. j u c u n d u s 



/;■ Thorax yellow with a blackish V-shaped mark on the 

 dorsum ; abdomen yellow with black band on pos- 

 terior margins of segments 1 and 2 ; fourth and 

 part of fifth black ; metatarsus 1.25 times as long 

 as the fore tibia (St Vincent Island) 



51. longimanus 

 Jih Thorax with grayish, brownish or ferruginous stripes 

 i With an oval lobe or mace shaped prominence on each, 

 abdominal segment; wings with faint cloud on cross- 

 vein ; lengtli 7.5 mm 52. 1 o b i f e r u s 



