82 AMERICAN HYMENOPTERA. 



NOTES. 



(1.) llelissodes raphaelis Ckll. is to be compared with atrata. It 

 differs by having the pubescence of thorax above partly grey : 

 patches on fourth abdominal segment yellowish ; pubescence of 

 pleura partly grey and partly black. 



(2.) 31. morosa Cress., from Mexico, may also be compared with 

 atrata. It is about 12 z mm. long ; thorax clothed with short dense 

 black pubescence, with a slight admixture of ochraceous on pro- 

 thorax and mesothorax ; head with ochraceous pubescence, mixed 

 with black on vertex and occiput; abdomen with ochraceous mark- 

 ings, including broad apical margins of segments 3 and 4, and 

 oblique lines on sides of 2; legs witli short black pubescence; pos- 

 terior tibite and tarsi with long yellow pubescence ; hair fuscous on 

 tarsi within. 



(3.) Xenoglossa apicxdaki (Cress.) differs at once from M. caligl- 

 nosa by having abdomen l)eyond second segment covered with 

 orange-red hair, and hair on hind legs all black or brown-black ; 

 hail- of thorax brown-black, but sides of mesothorax, especially 

 above and behind tegulse, have ochreous hair, quite pale; hair of 

 face and front pale ochreous. 



From A', gabbi it differs thus : ■ 



Larger ; red of abdomen coveriug second segment gabbi Cress. 



Smaller; red of abdomen not covering second segment apicnlata Cress. 



Group H. 



Piihencence of thorax above not M all black, or if so, of pleura not black; abdomen black, 

 without bands, or with only traces of them ; hair of apex black, without light 

 markings. 



Base of abdomen without light bair; vertex shining; pubescence of thorax och- 

 raceous, short and dense; hind tarsi with long black hair; wings 

 strongly smoky Emphor bonibif'ormis (Cress.). 



Base of abdomen with more or less light hair 1. 



1. Hair of hind tibise and tarsi wholly black or dark purplish fuscous 2. 



Hair of hind tibiae at least largely pale, whitish or reddish 4. 



2. Hair of vertex and thoracic dorsum all ochraceous;' base of second abdoniinal 



segment with pale hair; large species, about 16 mm. long; wings fuli- 

 ginous 9Ielisso<les (EpinieIis$>»o(les) atripe.^ Cress. 



Hair of vertex black ; of pleura also black ; base of second abdominal segment 

 without pale hair 3. 



3. Larger; hair of face black, of mesothorax in front ochreous, with at most the 



edge black haired ; clypeus not carinate. 



1*1. atrirron!>i Sm. = caroIineii!i>is D. T. 



