932 MOSQUITOES or 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. 9S6) 



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



ADUI^TS, MALES ONLT. 



1. Abdomen with red anal tufts superius 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 te.rsi 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) 



ADTTLTS, MALE GENITALIA. 



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



superius 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 



(portoricensis von Roder (p. 961) 

 J trinidadensis Dyar & Knab (p. 945) 

 I guadeloupensis Dyar & Knab (p. 955) 

 [hypoptes Knab (p. 958) 

 Clasp filament shorter; unci shorter and stouter 



r septentrionalis Dyar & Knab (p. 949) 

 -! rittiZa Coquillett (p. 942) 

 [moctezuma Dyar & Knab (p. 953) 



We possess no male specimens of violaceus 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. Chltinous parts yellow super'bus Dyar & Knab (p. 935) 



Chitinous parts deep brown 



The following species are so similar that we are nnable 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 larvae of grandiosa Williston, longipes Theobald, and rutila Coquillett 

 are unknown. 



MEGARHINUS SUPERBUS Dyar & Knab. 

 MegarrMna hwmorrhoidalis Osten Sacken (in part, not Fabrlclus), Cat. Dipt N. 



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

 MegarrMna hamorrhoidalis Williston (not Fabricius), Biol. Cent. Amer., Dipt., 1, 



224, 1901. 

 Megarhinus hcemorrhoidalis Howard (not Fabricius), Mosquitoes, 162, 240, 1901. 

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



178, 179, 1906. 

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



Ser. No. 11, 14, 1906. 



