T. D. A. coc;kerell. 69 



Basal joint of hind tarsi curionsly bulging in front, but not spined or 



toothed 4. 



Basal joint of hind tarsi neither spined, nor tootlied, nor bulging 5. 



3. Hair of thorax and base of abdomen above very bright orange-fulvous; face 



broad ; face-markings cream color KOdalis Cress. 



Hair of thorax, etc., greyish vv^hite. gohrmanse Ckll. 



4. First abdominal segment covered with ochreous hair, which neither overlaps 



nor extends onto base of second segment; hair of thorax above 

 ocbraceous; face-marks light yellow; abdomen curiously narrowed 



apically ceiitriforiuis Cress. 



Differing from typical centriformis in having face-marks, labruni, etc., white; 

 tegulse lighter and redder ; abdomen beyond first segment with a good 

 deal of fine white pile, conspicuous on margins of segments; hind 

 margins of abdominal segments broadly whitish (Alamogordo, New 

 Mexico, May 12,Viereck). ceiiSriforniis vierecki n. subsp. 



5. Last joint of middle tarsus with an extremely broad black fringe; pubescence 



of thorax and base of abdomen above very bright orange-fulvous; 

 face-marks deep chrome yellow ; face very narrow, .crotcliii Cress. 

 Last joint of middle tarsus without such a fringe ; face broader. 



fedorica Ckll. 



6. Fourth abdominal segment covered with fulvous hair like the first, second and 



third Occident alls Cress. 



Fourth abdominal segment not covered with fulvous hair-. 7. 



7. Second and third abdominal segments covered with bright rufofulvous hair. 



iieoniexicstna (Ckll.). 



Second and third abdominal segments not so covered ; only the first very 



hai ry 8. 



8. Abdomen black, without hair-bands, the light hair confined to first seg- 



ment 9. 



Abdomen with more or less evident hair-bands. 10. 



9. Hair of abdomen above all black, except the basal declivity, which has some 



pale hair; teguhe black abrupla Say. 



Hair of first abdominal segment all dull white ; tegulse light ferruginous. 



abruplclla Ckll. 



10. Hair of thorax above fulvous; bands of fine appressed hair on second and 



third abdominal segments very broad niontsiiia Cress. 



Hair of thorax above very pale ochreous; hair bands on second and third 

 abdominal segments apical and narrow affabilis Cress. 



Note. — The Cliiliaii A. distinguenda Spinola, is extremely close 

 to A. Montana. 



Antliuphora siinilliina Cresson. 



Boulder, Colorado: males at flowers of Ribes cereum and loco- 

 weed {Amgallus), April 29 ( TF. F. and T. D. A. CockereU), male at 

 flowers of Vio/a nuttallii, sucking, going to three successively ( TF. 

 F. CockereU.) Fort Collins, Colo., May 15, 1904. S (Colo. Agr. 

 College). 



TBANS. AM. ENT. SOC. XXXII. JANUARY, 1906. 



