76 Till-: COMMON MOSQUITOKS OF M i X X KSOTA 



in the spriiij;- to i^et the early species. Later a spraying" as often 

 as once in two weeks may be necessary. \\ oodland pool mos- 

 cjtiitoes max he controlled in the same way. although not many of 

 them will annoy man unless dwellings are close to the edge of the 

 woodland. 



Key for Determining Adult Mosquitoes. 



The following" key is based as far as possi])le on grosser, easil}' 

 recognized characters, recognition characters: 

 A. Wings spotted. 



B. Two dark sjaots on front margin of wing: last vein white with 

 end black. 



A II ophclcs p n II ctipriiii is 

 BF!. Wings with fonr distinct brown spots: last vein all brown. 



Anopheles qiiadritiiaciilatiis 

 AA. Wings not spotted. 



B. Tarsi white or yellowish iianded. 



C. Beak with a wide white band near the middle of its length. 



D. A large brown mosquito, with brown and white scales 

 producing a mottled appearance. Bands on l)ase of 

 tarsal segments. 



Maiisoiiia prrtiirbaiis 

 DD. A smaller, greyish mosquito. Tarsal bands on both 

 liasc and tip of tarsal segments. 



Citlc.v larsiilis 

 CC. I'.eak unlianded. 



D. Joints of tarsi l)earing white band only at the l)ase of 

 each segment. 



E. A small dark species: white bands at the base of 

 the abdominal segments strongly constricted on 

 the median line : wings lightly scaled. 



Acdi's syli'cstris 

 EE. A large species; wings thickly scaled: anterior 

 edge black: thora.x with a broad dark median 

 stripe. 



Acdcs abfitchii 

 DD. Joints of tarsi witli a wliite ])and at l)otli base and tip 

 of each segment: last joint of liind tarsus usually en- 

 tirely white. 



Acdcs cdiiadciisis 

 BB. larsi unbanded. 



C. riiiirax striped, or spotted. 



D. riiorax with two white longitudinal stripes, 



Acdcs Irii itiatiis 



DD. Two small white dots, one cm each side of median line, 



and a U-shaped mark at the base. ( These may l)e lacking.) 



Ciilc.v rcstuaiis 

 DDD. Thorax golden scaled with br^ad dark l)rown Iiand in 

 middle. 



Acdcs auraidcs 

 CC. Thorax unmarked. 



D. Small dark lirown species: abdominal bands wider in 

 middle than at sides except on seventh segment whicli is 

 wider at the sides : legs and lieak lilack. 



Acdcs fiisciis 

 DD. Medium sized brownish species: bands of alxlominal seg- 

 ments of moderate width. 



Ciilc.v pi pi ens 



