T. D. A. COCKEKELL. 77 



5. Abdominal segments 3-5 piactically covered with pubescence; labium with a 



very large yellow spot veriioneiisiN ( Viereck). 



Abdominal segments 3-5 with the surface exposed, except at the tiands 6. 



6. Larger; abdomen duller, more banded and more punctured 



fiiubriHta Cress. 

 Smaller; abdomen shinier, less banded and less punctured. 



perplexa Cress. 

 (In fimbriafa the hair on exposed part of abdominal segments 4 and 5 is black.) 



7. Smaller; hind margins of abdominal segments black ; anteunse long (Cuba). 



mi mica Cress. 

 Larger ; hind margins of abdominal segments hyaline ■ • • 8. 



8. Black hair of thorax almost or quite confined to scutellum ; tegulse without 



black hair gileiiKis Ckll. 



Mesothorax with a good deal of black hair; tegulse with black hair. 



griiideliie Ckll. 

 NOTES. 



(1.) M. desponsa Sni., det. Cre.ssoii, has the labrum black with a 

 round yellow spot ; .scape black ; flagellum red beneath ; upper edge 

 of clypeus fringed with dark hairs. M. cnici Rob., has the same 

 characters except that it seems larger, and the labrum lacks the 

 yellow spot. 



(2.) M. confusa Cress., has the labrum all black ; flagellum all 

 brown-black, with raised longitudinal lines ; clypeus with black 

 spot on each side ; abdomen with pale hair bands. 



(3.) M. otomita Cress., has a light spot on mandibles. 



(4.) 31. fimbriafa Cress., has the hair bands and b. j. of rivalis ; 

 but in rivalis the hair of thoracic dorsum is pale ochreous ; while in 

 fimbriata it is dull white, and black in the middle, and the abdo- 

 men of fivibriata is more hairy. 



(5.) M. perplexa Cress., has the labrum all black, and the cly- 

 peus cream colored, with the upper part largely black ; while iJ/. 

 manipularis Sm., has the labrum with a large yellow spot, and the 

 clypeus yellow. Both species occur in Georgia. 



(6.) The labrum has more or less black at sides in M. menuacha 

 M. agilis and the Cuban Florilegus lanieri. 



Group C. 



Cli/pens and labrum li(jM ; Ihorax above with coHspicnous black or fiiseona hair, at 

 least on scutellum. (In 31. coloradensis there are only a few dark haiis; 

 the black hair could not be called conspicuous.) 

 Scape entirely clear ferruginous; legs all red ; robust species, with antennpe only 



of moderate length Melisisodes texaiia Cress. 



Scape dark brownish or black (Melissodes) 1. 



TBANS. AM. ENT. SOC. XXXII. ./ANUAKY, 1906. 



