86 MAINE AGRICULTURAL EXPERIMENT STATION. I912. 



ee. Wing not so marked. 



f. Mes.onotum opaque dark broA\'n. St. Vincent Isl. 



17. dolosa. 

 ff. Mesonotum polished black, branches of cubitus diverg- 

 ing, 

 g. Cubitus forks under the crossvein. 18. vittrea. . 



gg. Cubitus forks proximad of the proximal end of the 

 crossvein. 19. anomala n. sp. 



dd. Wing with one or more spots. 



e. Wing v^?ith only one spot which covers the crossvein. 

 f. Fore metatarsus longer than its tibia; mesonotum 

 yellowish red. St. Vincent Isl. 20. insipiens. 



ff. Fore metatarsus not longer or shorter than the tibia, 

 g. Thorax and abdomen blackish ; length 2.3 mm ; 

 hypopygium (Fig. 78). 21. bipunctata. 



gg. Thorax shining brown, lateral margins and a spot 

 on center of scutellum yellow; length $.7 mm. 



22. inculta. 

 ee. Wing with 2 or more spots or clouds. 



f. Abdomen yellowish, intermediate segments each with 

 a large blackish spot on each side leaving a median 

 yellow stripe ; sortietimes largely black with only a 

 narrow median vitta ; thorax with 3 subconfluent 

 stripes, scutellum yellow. 

 g. Superior forceps of hypopygium rather broad and 

 short, with a blunt black spine (Fig. 80). 



23. scalaris. 

 gg. Superior forceps somewhat elongate (Fig. 82). 



23a. scalaris vav, a. 

 ff. Abdomen not marked thus. 



g. Tibial spurs whitish abruptly tipped with black; 

 thorax reddish yellow, moderately shining with 

 3 dark stripes ; besides the central spot a series of 

 3 spots on the wing forming an irregular pre- 

 apical fascia. 34. sigmoides. 



gg. Tibial spurs not distinctly black tipped. 



h. Middle tibise each with 3 or 4 setje on flexor sur- 

 face. 

 i. Fore tarsi slightly swollen below, joints 2, 3 

 and 4 wider than i. 

 j. Ochraceous, shining, thorax with subconfluent 

 dusky stripes ; abdominal segments with 

 wide yellow posterior margins. 



24. pinguis. 

 jj. Dusky species, humeri yellow. 



k. Incisures of abdomen yellow; hypopygium 



(Fig. 81). 25. foeciinda n. sp. 



kk. Abdomen wholly dark; hypopygium (Fig. 



91). 26. imitator n. sp. 



