T. D. A. COCKERKLL. 81 



5. Hair of fifth abdominal segment all black ; even at sides (Texas). 



Iff. <;alvesfoneiisis ('kll. 



Hair of fifth abdominal segment black, except at extreme sides 6. 



Hair of fifth abdominal segment at least partly light on disc 7. 



6. Wings paler; second subniarginal cell smaller M. tepaiieCH Cress. 



Wings darker; second subniarginal cell much larger; otherwise same, and per- 

 haps only a race of tepaneca W. kallstruciiiisc Ckll. 



Like kaUsti-cemise, but pale yellowish (not white) hair of thorax above, and the 

 white (instead of pale fulvous) hair bands of abdomen. 



ill. kailstroeniite phenacoideK Ckll. 



7. Middle and hind legs dark or rather light ferruginous; abdomen with metallic 



tints (Cuba) Floi'ilegus lanieri (Guer.). 



(F. condigna Cress., syn. palnstris Rob. also runs here, and is scarcely to be 

 separated.) 

 Middle and hind legs black 8. 



8. Subapical spines of abdomen red ; hind margins of abdominal segments black. 



" M. penUfiylTHiiica Lep. ?" in coll. Amer. Ent. Soc. 



Subapical spines of abdomen black; hind margins of abdominal segments 



whitish M. aiirigeiiia Cress. 



Note. — The above " pennsylvanieaV does not agree well with 

 Lepeletier's description, which states that the clypeus is " blanc 

 sale," hair of head and thorax ashy red, lower borders of abdominal 

 segments largely discolored with reddish, nervures pale red. Robert- 

 son thought he recognized M. pen.nsylvanica, but later concluded 

 that there was no proof of identity, and described his species as M. 

 trinodis Rob. 



FEMALES. 



Group G. 



Pubescence of thorax above all, or nearly all, blach: of pleura also black. 



Pubescence of face below antennse white or whitish 1. 



Pubescence of face below antennae black. ... 2. 



1. Smaller; a large white patch on each side of fourth abdominal segment 



(Mexico) W. atrata Smith. 



L;irger ; abdomen without white jiatches M. caligiiiOM:i C'ress. 



2 Very large and robust, about 22 mm. long; abdomen, except base, covered 

 with a felt-like fulvous tomeutum. . ■ XeiiogloMsa gabbi (Cress.). 



Much smaller; 11 mm. long or less ; abdomen with black pubescence 3. 



Not quite so small ; 12 mm. long : entirely black, with black pubescence ; abdo- 

 men shining, nearly naked (Cubaj n. inaiira Cress. 



3. Larger; fourth abdominal segment with a large white patch on each side. 



91. biniaculata Lep. 

 Smaller; fourth abdominal segment with no white patches (Cuba). 



91. pullata Cress. 

 (For a more extended table of the biniaculata group, see Canad. Entom., July, 

 1905, p. 266.) 



TRANS. AM. ENT. SOC. XXXII. (11) JANUAKY, 1906. 



