l68 MAINE AGRICULTURAL EXPERIMENT STATION. I9IO. 



gg. Fore metatarsus shorter than its tibia, 

 h. Neither thorax nor abdomen with dis- 

 tinct dark markings ; cubitus forks 

 under or distad of the R-M crossvein ; 

 length 3 mm. St. Vincent Isl. 



18. iiicridionalis n. n. 

 hh. Not as above. 



i. Length 5 mm. or more. 



j. Thorax and scutellum yellow; cu- 

 bitus forks far before the base 

 of the radial sector. 



19. flavohirta. 

 ']]. Thorax with three subconfluent 

 black stripes ; cubitus forks un- 

 der the R-M crossvein. 



20. mendax n. sp. 

 ii. Length 3.5 mm. or less. 



j. Subcostal crossvein proximad of 

 middle of cell R^. 



16. appcndiculata. 



]']. Subcostal crossvein at middle of 



cell Rj. 17. hirticollis. 



Females, 

 a. Subcosta does not end in the costa. 



b. Subcosta ends in a stump ; petiole of the media is shorter 

 than Mo ; thorax yellow with dark brown stripes ; cu- 

 bitus forks under the R-M crossvein. 

 c. Length 6.5 mm. 14. maxima n. sp. 



cc. Length 3.5 mm. 3. sequax n. sp. 



bb. Subcosta ends upon Rj ; petiole of the media is longer 

 than M. ; length 3 to 4 mm. 

 c. Thorax and abdomen mainly dark. California. 



I. littoralis var. frequens n. var. 

 cc. Thorax and abdomen largely yellow. . I. littoralis. 

 aa. Subcosta ends in the costa. 



b. Posterior margin of each tergite black or brown. 



c. Cubitus forks distad of the R-M crossvein; fore meta- 

 tarsus shorter than the tibia ; length 3 mm. 

 d. Subcostal crossvein near middle of small cell Rj. 



8. tantilla. 



