THE CANADIAN ENTOMOLOGIST. 023 



Dianthidium boreale, n.sp. — $ . Closely resembles D. notatum, Latr., 

 but the abdominal segments 6-7 have a median carina, which in the 

 latter terminates in a tubercle ; segment 6 has on each side an elevated 

 portion, each terminating in a discal subapical tooth and a lateral apical 

 one ; pulvilli present ; wings clouded, basal nervure almost interstitial 

 with transverse medial, second recurrent nervure passing beyond second 

 cubital; antennas black; legs red, anterior and middle knees, apex of 

 tibia? and metatarsi, yellow; other yellow ornaments as follows : mandibles, 

 face below antennae, transverse line on vertex, tubercles, tegulae in front, 

 line above, four spots on scutel, large spot on each side of segment 1, 

 arcuate fascia on each side of 2, two discal and two lateral spots on each 

 side of 3-5, a large spot on each side of 6 covering the elevated portion, 

 and all except base of 7. Length, 8 mm. 



Carlinville, Illinois ; 1 £ specimen. 



Among several other good characters of Dianthidium may be 

 mentioned the well-developed pulvilli. 



Stelidium gn. nov., trypetinum sp. nov. — $• Black; pubescence 

 thin, pale; punctures coarse and close; mandibles narrow, tiidentate, 

 rufous before apex ; maxillary palpi one-jointed ; cubital cell 2 longer 

 than 1, receiving both recurrent nervures about equally distant from base 

 and apex ; scutel simple ; abdomen strongly conical ; segment 6 longer 

 than 5, apical margin carinate ; ventral segment 6 longer than 5, nearly 

 as long as wide, produced beyond dorsal segment, with a subapical 

 carina ; nearly obsolete whitish ornaments as follows : narrow anterior 

 orbits, transverse spot on each side of vertex, four widely-separated 

 equidistant spots near apical margins of segments 1-3. Length, 5 mm. 



Carlinville, Illinois ; 2 % specimens. The venation, structure of 

 abdomen, and the ornaments mark this as quite a peculiar form. I am 

 quite sure it is an inquiline of Trypetes carinatus. 



Melissodes vernonice, sp. nov. — 9 • Black, clothed with pale whitish 

 or griseous pubescence ; some black hairs on the vertex in front, a 

 subquadrate patch on the mesonotum and the scutel also with black 

 hairs ; hind metatarsi blackish beneath ; segment 2 of abdomen has a 

 narrow basal and a broader median whitish fascia ; segments 3 and 4 

 with broad fascia? reaching the apex of 4, and nearly reaching the apex of 

 3 ; segments 5 and 6 with pubescence black or fuscous ; wings hyaline, 

 nervures testaceous ; middle of mandibles rufous ; flagellura testaceous 

 beneath. Length, 12-14 mm. 



