900 MOSQUITOES OF NORTH AMERICA 



Lahille, in 1904, established a subfamily, Uranotsenina, for Uranotcenia 

 (Actas y Trabajos 2 Congr. Med. Latino-Amer., ii, 11, 20) and this has been 

 adopted by Coquillett (1906), Peryassl (1908) and Theobald (1910). 



The species being of no economic interest and of small size, comparatively 

 little general attention and valuation have been given to what may be called a 

 rather well-marked group. 



The eggs are subcylindrical and laid in boat-shaped masses which float on the 

 surface of the water ; the single eggs are placed upright, as in Culex. The larvae 

 live generally in ground-pools of a more or less permanent character, in swamps 

 or in the grassy edges of lakes. In Java and the Seychelle Islands the larvae of 

 certain species inhabit the liquid in the leaf-cups of Nepenthes. The larvae, 

 owing to the shape and coloration of the head and to their position in the water, 

 show a resemblance to those of Anopheles, and are occasionally mistaken for 

 such by inexperienced observers. There is no close resemblance, for the larvae 

 are not surface feeders, but lie horizontally in the water below the surface. We 

 have no information about the habits of the adults. 



Tables of the Species, 

 adults, stetjct0be, and colobation. 



1. Legs with the tarsi all black 2 



Legs marked with white, the last joint of hind tarsi white 4 



2. Mesonotum without median blue line anhydor Dyar (pp. 926, 1041) 



Mesonotum with median blue line 3 



3. Blue line extending the whole length of mesonotum 



sapphirinus Osten Sacken (p. 901) 

 Blue line ending at antescutellar area socialis Theobald (p. 905) 



4. Mesonotum with a median blue stripe ending at antescutellar area 



pulcherrima Lynch ArribSlzaga (p. 908) 

 Mesonotum not so marked 5 



5. Mesonotum with a blue spot before antescutellar area 6 



Mesonotum without blue ornamentation on median line 7 



6. Hind legs with last two joints and tip of third white 



geometrica Theobald (p. 918) 

 Hind tarsi with last joint white, the fourth black in the middle 



pulcherrima, variety apicalis Theobald (p. 908) 



7. Thorax with a white lateral line 8 



Thorax without such marking 9 



8. Abdomen with apical segmental white patches; thorax white-marked before 



calosomata Dyar & Knab (p. 922) 

 Abdomen with basal segmental bands; thorax without white anterior marks 



hasalis Howard, Dyar & Knab (p. 917) 



9. Abdomen without white lateral spots typhlosomata Dyar & Knab (p. 924) 



Abdomen with lateral spots 10 



10. Knees white-marked lowii Theobald (p. 911) 



Knees not white-marked continentalis Dyar & Knab (p. 914) 



The following species is not included as the adult is unknown : coatzacoalcos 

 Dyar & Knab. 



ADULTS, MALE GENITALIA. 



1. Clasp-filament with many terminal claws lowii Theobald (p. 913) 



Clasp-filament with a single terminal claw 2 



2. False harpagones forming a group of closely placed subequal teeth 3 



False harpagones with separated plates or rods 5 



3. False harpagones with fine teeth typhlosomata Dyar & Knab (p. 926) 



False harpagones with large, coarse teeth 4 



4. Clasp-filament nearly as long as the side piece geometrica Theobald (p. 921) 



Clasp-filament shorter than the side piece sapphirinus Osten Sacken (p. 903) 



5. Erect plate of false harpagones broad, furcate at tip. . socialis Theobald (p. 907) 

 Erect plate of false harpagones slender, rod-like, widely branched 6 



6. Outer plate of false harpagones small, basal 



l>asalis Howard, Dyar & Knab (p. 918) 

 Outer plate of false harpagones recurved, forming a large loop 



calosomata Dyar & Knab (p. 924) 

 Outer plate of false harpagones a stout recurved loop 



pulcherrima Lynch Arrib&lzaga (p. 910) 



