24 INSECUTOR INSCITI^ MENSTRUUS 



SPECIES OF cuterebra 



1. Whole thorax and scutellum clothed with light-colored pile 2 



Mesoscutum and scutellum clothed only with short black hairs 3 



2. Thoracic and scutellar pile cinnamon-yellow, dense ; anal segment 



with only black hairs cuniculi Ok. 



Thoracic and scutellar pile pale yellowish, rather thin; anal seg- 

 ment similarly pilose analis Mcq. 



3. Parafacials and cheeks wholly or partly white-hairy 4 



Parafacials and cheeks entirely black-hairy 5 



4. Pleurae with only black pile approximata Wlk. 



Pleurae with yellowish-gray pile hisirio Coq. 



5. Pleurae with only black pile or at most traces of whitish 6 



Pleurae for the most part with whitish or yellowish pile, 



americana Fab. 



6. Anal segment shining like rest of abdomen tenehrosa Coq. 



Anal segment more or less pollinose, leaving rounded shining areas. 7 



7. Mesocutum shining, without pruinosity atrox Clk. 



Mesoscutum largely whitish-pruinose maculosa Knab 



SPECIES OF BOGERIA 



1. Mesoscutum with light-colored pile 2 



Mesoscutum with only black hair 3 



2. Anal segment shining, not pollinose but thinly clothed with light 



hairs emasculator Fitch. 



Anal segment densely yellowish or grayish pollinose and with light 

 hair , grisea Coq. 



3. Mesoscutum grayish pruinose, thinly clothed with short hairs 4 



Mesoscutum not pruinose, the hair longer and pile-like 6 



4. Hind edge of scutellum with thicker and longer hair than that of 



mesoscutum 5 



Hind edge of scutellum with only short hair buccata Fab. 



5. Anal segment densely yellowish pollinose, clothed with yellow 



hair fontinella Clk. 



Anal segment with only thin pollen and black hair princeps Aust. 



6. Anal segment densely yellowish pollinose, with yellow hair, 



fasciata Swenk 

 Anal segment thinly pollinose at most, with only black hair, 



scudderi n. sp. 



Pseudo gametes semiatra Wied. — Specimens of this most 

 striking form, from southern Brazil, sent by Dr. A. Lutz, show 



