250 Maine: agricui^tural Kxperimknt station. . 1909. 



jj. Fore metatarsus over a third longer than 

 the tibia; hypopygium (fig. 107). 

 19. subterniinalis var. nexilis n. var. 

 ii. Fore metatarsus equal to or shorter than 

 the tibia. 

 j. Mesonotum mainly yellow; stripes if 

 present, pale, coalesced part of media 

 shorter than the petiole. 

 k. Anal vein prolonged to margin; 

 hypopygium with lobe-like for- 

 ceps (fig. 99). 17. mendosa. 

 kk. Anal vein not prolonged to margin ; 

 fore metatarsus and tibia sub- 

 equal; hypopygium robust (fig. 

 100). 22. genualis n. sp. 

 jj. Mesonotum black or with dark stripes, 

 coalesced part of media usually equal 

 to or greater than the petiole. 

 k. Fore metatarsus about 1-5 of tibial 

 length shorter than the tibia; sub- 

 costa ends about twice the width of 

 the costal cell proximad of the base 

 of the radial sector ; length 5-6 mm. 

 23. scapt'daris n. sp. 

 kk. Fore metatarsus o.i or less shorter 

 than tibia; subcostal vein ends not 

 more than the width of the costal 

 cell proximad of the base of the 

 radial sector; length 8-9 mm. 



I. Scape of antenna and base of some 



abdominal segments yellowish. 



24. elegantula. 



II. Scape of antennse black; abdomen 



of male mainly black. 



25. tceniata. 



I. Platyura parva Williston. 

 1896. parva Williston, Trans. Ent. Soc. London 257. 

 Male. Length 2^ to 3 mm. Antennse brownish-yellow, 

 shorter than the thorax. Posterior part of the mesonotum, the 



