52 American Midland Naturalist Monograph No. 3 



Frontal hairs (5-7) small, simple; abdominal segments I-VI with hair 6 plumose 

 barbed Coq., p. 57 



2. Palmate hair (I) well-developed on abdominal segments I-VII, the individual 



leaflets with smooth margins albimanus Wied., p. 81 



Palmate hair (1) obsolete or greatly reduced on abdominal segments I and II 3 



3. Outer clypeal hair (3) simple; hair 9 of meso- and metathoracic pleural groups 



short and stout, no more than half as long as hair 10 



p. pseudopunclipennis Theob., p. 66 



Outer clypeal hair (3) feathered or branched; hairs 9 and 10 of meso- and meta- 

 thoracic pleural groups nearly equal m length 4 



4. Outer clypeal hair (3) sparsely branched (only 5-10 short branches) 



atropos D. and K., p. 54 



Outer clypeal hair (3) strongly dichotomously branched (more than 25 branches) 



5. Inner clypeal hair (2) with sparse minute feathering toward tip; prolhoracic hair 



1 with 3-5 strong branches near base Tvall(eri Theob., p. 77 



Inner clypeal hair (2) simple; prothoracic hair 1 short, single or weakly branched 

 at tip 6 



6. Hair and hair 2 on abdominal segments IV and V both well-developed, each 



with 4-9 branches crucians crucians Wied., p. 62 



Hair absent or rudimentary ' 



7. Palmate hair (1) on abdominal segments III-VII about equally developed (pal- 



mate on segment VII may be somewhat smaller) ; individual leaflets on 



palmates III and VII serrated on margins 8 



Palmate hair ( I ) on abdominal segments IV- VI about equally developed, those 

 on segments III and VII being rudimentary or only about one-half to two- 

 thirds as large; individual leaflets on palmates III and VII usually with smooth 

 margms 9 



8. Basal tubercles of inner clypeal hairs (2) separated by at least the diameter of 



one tubercle; hair 2 usually single, sometimes double, on abdominal segments 



IV and V; sutural hair (8) generally 8 to 10-branched 



quadrimaculatus Say, p. 75 



Basal tubercles of inner clypeal hairs (2) close together, separated by less than 

 the diameter of one tubercle; hair 2 usually double, occasionally single or 

 triple, on abdominal segments IV and V; sutural hair (8) generally 5 to 7- 

 branched punctipennis (Say), p. 71 



9. Palmate hair (1) functional on abdominal segments IV-VI only, those on seg- 



ments III and VII being rudimentary; hair 2 with 3-6 branches on segments 



IV and V (rarely with 2 branches) crucians eeorgianus King, p. 64 



Palmate hair (1) functional on abdominal segments III-VII, although those on 

 segment III and VII are reduced to about one-half to two-thirds the size of 

 those on segments IV-VI ; hair 2 single or double on segments IV and V 

 (sometimes triple) - crucians bradlexii King, p. 60 



Anopheles (Anopheles) atropos Dyar and Knab 



Anopheles atropos Dyar and Knab, 1906, Proc. Biol. Soc. Wash., 19:160. 



ADULT FEMALE. — Medium-sized species. Head: Proboscis long, black; palpi 

 about as long as proboscis, entirely dark or with very narrow pale rings at 

 apices of distal segments. Occiput clothed with dark erect forked scales; 

 frontal tuft dark. Thorax: Integument of scutum dark brown to dark reddish- 

 brown, clothed with short golden-brown hairs and larger black setae, the black 

 setae more numerous laterally. Abdomen: Integument dark brown to black, 

 clothed with dark hairs. Legs: Legs dark, knee spots reduced or absent. 

 Wings: Scales narrow, entirely dark, some of the scales often arranged in 

 four darker spots, usually indistinct. Halter: Knob of halter dark scaled. 



