392 NEW YOKK STATE MUSEUM 



4a Legs bearing many erect scales. Large species P s o r o p li o r a 



Legs witliont these scales (5) 



5 Thorax with metallic bine scales; small species; male with 



but a single curved claw on the middle leg; palpi of both 



sexes two jointed and short U r a n o t a e n i a (s a p p h i r i u a> 



Thorax not so marked (6) 



6 " Hind feet black, their apexes snow white." Male palpi 



long, in the female short Conchy Hastes 



Not as alioA'c (7) 



7 Palpi elongate (8) 



Palpi short (9) 



S The fourth fore tarsal .joint shorter than the fifth, about as 



long as wide. Palpi elongate and pointed C u 1 e x (males) 



Fourth fore tarsal, joint longer than wide. ;\Iale palpi 



with enlarged apical joints Anopheles 



9 Small species with two jointed palpi; the second joint conical. .A e d e s 

 Medium sized species, with four jointed palpi, its apical joint 



i^'ylindrical C u 1 e x (females) 



Of tbo sontlu 111 ^vneia, Mcgailiiniis and Toxorhynchites may 

 be known by their strongly enrved proboscis and green and 

 bluish colors. >^teg'omyia resembles Culex, but has the thorax 

 marked Avith linens of silvery scales. 



Subfamily coREXHreiNAE 

 Genus corethra Meigen 

 This genus together with Corethrella, Mochlonyx and Pelo- 

 rempis, nov. gen. forms the subfamily Corethrinae, which is dis- 

 tinguislu d from the remainder of the family by the comparative 

 shortness of the ]>roboscis. There are but 15 or IG species in the 

 genus, four or five of which occur in North America. The life 

 history of some of the species has long been known. Some of 

 the works on the biology of Coretlira are: 



1844 Staeg-er. Naturhist. Tidsskr. I. R. 2. B. 549, GOO. Corethra 



f u sea. 

 ISO!*) Weissmann, Dr A. Die Metamorphose der C. p 1 u m i c o r n i s . 

 1SS4 Herrick, A. Minn. Geol. Nat. Hist. Sur. p. 10. C. appoudi- 



c u 1 a t a . 

 18Sr. Meinert, F. De Eucephale Myggelarver. p.30 to 53. Witli hi))liog- 



raphy. 



Generic characters 

 Usually delicate, moderate sized species of the appearance 

 of a Chironomid, but distinguislied by its many veined wing. 

 Head transversely oval, e])istonie somewhat projectinj^; pro- 



