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. meridionalis n. n. 

 hh. Not as above. 



ii Length 5 mm. or more. 



j. Thorax and scutellum yellow; cu- 

 bitus forks far before the base 

 of the radial sector. 



19. Havohirta. 

 jj. 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. appendiculata. 



jj. Subcostal crossvein at middle of 



cell R^. 17. hirticollis. 



Females, 

 a. Subcosta does not end in the costa. 



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

 than M2 ; 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 R^ ; petiole of the media is longer 

 than Mo ; 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 R^. 



8. tantilla. 



