76 INSECUTOR INSClTIi^ MENSTRUUS 



Group V (Culicada Felt) 



3. Apical lobe flattened, papillose-tubercular canadensis Theobald 



Apical lobe conical 4 



Group IV (Ochlerotatus Arribalzaga)' 



4. Basal lobe bearing only two stout spines, or absent 35 



Basal lobe conical or expanded, setose 5 



5. Basal lobe more or less expanded and tubercular, short-haired, 



with or without an adjacent spine 6 



Basal lobe unmodified, uniformly long-haired 37 



6. Basal lobe expanded tubercular; two stout spines on the margin, 



at least one in the middle 7 



Basal lobe with a spine at the margin 8 



Basal lobe without stout spine, though the marginal hair may be 



somewhat enlarged 30 



7. Both spines on basal lobe well developed currici Coquillett 



Only the spine on middle of lobe distinct, 



campestris Dyar and Knah 



8. Basal lobe expanded, elongate; one stout spine on the margin of 



the lobe, elevated from the base and free 9 



Basal lobe more or less expanded ; one stout spine on the margin 

 adjacent to the side piece, not separated from the setae 15 



9. Basal lobe setose on two-thirds of inner margin 10 



Basal lobe setose only on the bulbous tip 11 



10. Basal lobe widened ; stem of harpago very stout, sinuate ; filament 



broadly fusiform atlanticus Dyar and Knab 



Basal lobe finger-shaped ; stem of harpago ligulate ; filament angu- 

 larly widened at base oligopistus Dyar" 



'^ Heteronycha Arribalzaga has precedence and is an Aedes; but I have not 

 been able to recognize the type, dolosa Arrib., so do not know to which section 

 Heteronycha should apply. Blanchard and others refer dolosa to the synonymy 

 of Cutex quinqucfasciatus Say, a proceeding negatived by Arribalzaga's original 

 description. 



" Aedes oligopistus, new species. 



Apical lobe of side piece finger-shaped, bare but for one rather stout seta at 

 tip and another at the side; basal lobe produced into a finger-shaped process, 

 reaching to three-fourths of the side piece, finely setose; a stout spine inserted at 

 one side. Harpago with long, slender stem, reaching nearly to middle of side 

 piece; filament long, angularly expanded at the base. Side piece, harpe and 

 clasp filament normal; basal appendages small, each with three setae. 



An adult male, taken by Mr. A. Busck, Trinidad, West Indies, June, 1905, has 

 the dorsum of mesonotum broadly silvery nearly to the lateral margins. Legs 

 black. 



Type, male. No. 215r)0. U. S. Nat. Mus. 



The specimen is recorded in the- monograph (page 781) under A. dupreei. 

 which it resem1)lfs in cfiloration. 



