iNSEcuTOR iNsciTi^ me;nstruus 25 



outside of it. A. fletcheri and riparius do not strictly belong 

 to it, entering a certain distance from the wooded prairies, as 

 remarked above. 



Basal lobe of side piece with a stout spine, stouter than the setse. 

 Spine very strong and distinct. 



Basal lobe strongly tubercular-expanded ; filament of harpago 



anguarly widened beyond middle stimulans Walker 



Basal lobe rugose-papillose, the area extending nearly to apical 

 lobe ; filament of harpago broadly expanded near base, 



fletcheri Coquillett 

 Spine weak, scarcely differentiated from the adjacent setae. 

 Basal lobe moderate. 

 Spine fairly strong ; filament of harpago short notched at base, 



fitchii Felt & Young 

 Spine weaker ; filament without a basal notch. 



Spines of basal appendages moderate mimesis Dyar 



These spines long pahistris Dyar 



Basal lobe highly conical ; filament of harpago long with broad 



knife-blade expansion riparius Dyar & Knab 



Basal lobe without a spine. 

 Basal lobe rugose-papillose, the area reaching up nearly to apical 



lobe excrucians Walker 



Basal lobe tubercular-expanded. 

 Filament of harpago angularly expanded toward base, 



mufatus Dyar 

 This filament expanded beyond the middle increpitus Dyar 



Aedes excrucians Walker. 



Citlcx cxcniciaiis Walker, Ins. Saund., 429, 1856. 

 Culex abHtchii Felt, Bull. 79, N. Y. State Mus., 381, 1904. 

 Culex siphonalis Grossbeck, Can. Ent., xxxvi, 332, 1904. 

 Acdes sansoni Dyar & Knab, Can. Ent., xli, 102, 1909. 

 Acdes enedcs Howard, Dyar & Knab, Monog., iv, 714, 1917. 



I have the following notes on the type of Culex excrucians: 

 "Culex excrucians Walker. Type, identified as such by E. A. 

 Waterhouse according to label; 'Saunders, 68-4:' folded label 

 'excrucians' in Walker's script. Almost entirely denuded ; 

 both antennas gone ; two hind legs and one middle leg left, no 

 terminal joints. Tarsal rings broad and basal ; abdomen com- 

 pletely banded, uniformly brown (specimen looks as though it 

 had been in alcohol) ; abdomen tapers and cerci are exserted." 

 Notes made by Dr. L. O. Howard, dated June 25, 1909. 



