932 MOSQUITOES OF NORTH AMERICA 



4 Thorax marked with contrasting colors 5 



Thorax green-scaled on the disk trinidadensis Dyar & Knab (p. 943) 



5. Thorax with yellowish median and lateral stripes 



septentrionalis Dyar & Knab (p. 946) 

 Thoracic stripes blue 7 



6. Abdomen beneath all golden longipes Theobald (p. 939) 



Abdomen with blue median area beneath rutila Coquillett (p. 940) 



7. Last two hind tarsal joints all white hypoptes Knab (p. 956) 



Last hind tarsal joint partly black moctezuma Dyar & Knab (p. 950) 



ADtTLTS, MALES ONLY. 



1. Abdomen with red anal tufts superbus Dyar & Knab (p. 932) 



Abdomen with black and yellowish anal tufts violaceus Wiedemann (p. 936) 



Abdomen without tuftings 2 



2. All tarsi without any white guadeloupensis Dyar & Knab (p. 954) 



Some or all of the tarsi white-marked 3 



3. All of the tarsi white-marked rutila Coquillett (p. 940) 



Mid and hind tarsi white-marked 4 



Hind tarsi only white-marked 6 



4. Joint 4 only of hind tarsi white 5 



Joints 4 and 5 of hind tarsi white trinidadensis Dyar & Knab (p. 943) 



5. Thorax with yellowish median and lateral stripes 



septentrionalis Dyar & Knab (p. 946) 

 Thoracic stripes blue moctezuma Dyar & Knab (p. 950) 



6. Hind tarsi white-marked on one side only hypoptes Knab (p. 956) 



Hind tarsi white-marked all around portoricensis von Roder (p. 958) 



ADULTS, MALE GENITALIA. 



1. Basal lobes small, approximate, with a deep emargination between 



superhus Dyar & Knab (p. 935) 

 Basal lobes large, remote, with a straight or at most shallowly emarginate 



connection between 2 



2. Clasp filament long; unci long, produced to slender points, dentate within 



C portoricensis von Roder (p. 961) 

 trinidadensis Dyar & Knab (p. 945) 

 guadeloupensis Dyar & Knab (p. 955) 

 .hypoptes Knab (p. 958) 

 Clasp filament shorter; unci shorter and stouter 



{septentrionalis Dyar & Knab (p. 949) 

 rutila Coquillett (p. 942) 

 moctezuma Dyar & Knab (p. 953) 



We possess no male specimens of violacetis Wiedemann, grandiosa Williston, 

 and longipes Theobald. 



TABLE OF THE LABViE. 



1. Integument of body showing iridescent colors violaceus Wiedemann (p. 938) 



Integument of body without iridescence 2 



2. Chitinous parts yellow superbus Dyar & Knab (p. 935) 



Chitinous parts deep brown 



The following species are so similar that we are unable to give any safe 

 characters for their separation: septentrionalis Dyar & Knab (p. 949) ; mocte- 

 zuma Dyar & Knab (p. 953) ; portoricensis von Eoder (p. 961) ; guadelou- 

 pensis Dyar & Knab (p. 955) ; trinidadensis Dyar & Knab (p. 945) ; hypoptes 

 Knab (p. 958). 



The larvas of grandiosa Williston, longipes Theobald, and rutila Coquillett 

 are unknown. 



MEGARHINUS SUPERBUS Dyar & Knab. 

 Megarrhina hwmorrhoidalis Osten Sacken (in part, not Fabricius), Cat. Dipt. N. 



Amer., 2 ed., Smiths. Misc. Colls., xvi (No. 270), 18, 1879. 

 Megarrhina hwmorrhoidalis Williston (not Fabricius), Biol. Cent. Amer., Dipt., i, 



224, 1901. 

 Megarhinus hwmorrhoidalis Howard (not Fabricius), Mosquitoes, 152, 240, 1901. 

 Megarhinus violaceus Dyar & Knab (not Wiedemann), Journ. N. Y. Ent. Soc, xiv 



178, 179, 1906. 

 Megarhinus violaceus Coquillett (not Wiedemann). U. S. Dent. Agr.. Bur. Ent. Tech. 



Ser. No. 11, 14, 1906. 



