March, 1907.] DyAR AND KnAB ; AMERICAN MOSQUITOES. 9 



Page 619, Nemopoda cubensis Bigot, Annales, 1886, 390. 

 Page 620, Nemopoda cceruleiforniis should read carttleifrons. 



Page 652, under Leucopis nigricornis, add Needhani, Psyche, 1903, 27, larvae feed 

 on Aphis cephalanthi . — Lake Forest, 111. 



DESCRIPTIONS OF SOME AMERICAN 

 MOSQUITOES. 



By Harrison G. Dyar and Frederick Knae, 



Washington, D. C. 



Aedes angustivittatus, new species. 



Proboscis brown ; palpi entirely dark ; head with a narrow pale margin behind 

 the eyes and the vertex broadly pale scaled ; thorax brown with two narrow longi- 

 tudinal golden yellow stripes extending the entire length, connected at the tront 

 margin by a narrow transverse stripe of the same color. In front of the base of the 

 wing are many pale golden hairs. Pleura pale scaled. Abdomen black above, with 

 light lateral patches at the front angles of the segments, beneath creamy white, 

 segments with a narrow black margin behind. Legs dark, unhanded, the femora 

 pale beneath and at base. All tarsal claws toothed in the female. 



25 specimens, Port Lirnon, Costa Rica ; Zent, 20 miles from Port 

 Limon ; Rio Aranjuez, near Puntarenas, Costa Rica (F. Knab); Blue- 

 fields, Nicaragua (W. F. Thornton). 



Type. — Cat. no. 10 140, U. S. Nat. Mus. 



Nearly allied to Aedes trivittatus Coquillett, but the golden 

 thoracic lines are narrower. 



Aedes obturbator, new species. 



Proboscis brown ; palpi dark ; head behind the eyes pale yellowish ; at the sides 

 a dark spot ; thorax bronzy yellow, a median dark brown stripe running the whole 

 length, the lateral margin brown with irregular outline; the scutellum is silvery; 

 pleura pale scaled. Abdomen black above, with white basal bands ; beneath en- 

 tirely pale. Legs dark, unhanded, the femora pale beneath. All tarsal claws 

 toothed in the female. 



22 specimens, Tarpon Bay, Bahama Islands (T. H. Coffin). 

 Type. — Cat. no. 10141, U. S. Nat. Mus. 



Allied to Aedes auratus Grabham, but the thorax has a brown 

 median band. 



Aedes balteatus, new species. 



Proboscis black ; palpi black ; head behind the eyes pale bronzy, a large dark 

 spot on each side ; thorax bronzy yellow on the disk, a rounded deep brown patch on 



