THE CANADIAN ENTOMOLOGIST. 63 
honey-yellow, shining, not nodose ; metathorax rather larger than pro. 
and. mesothorax, convex and somewhat prominent posteriorly ; legs honey- 
yellow, the femora more or less fuscous ; abdomen ovate, first two seg- 
ments pale honey-yellow, remainder black, with a slight iridescent reflec- 
tion; first segment broadly dilated at apex ; ovipositor longer than first 
and second abdominal segments. Length .13 inch. 
ffab.— Ontario, Canada. (Saunders). Three specimens. A very 
pretty, and easily recognized species. 
7. PEZOMACHUS COMPACTUS. JV. sf.—2.—Short, compact, robust, 
bright honey-yellow ; antennæ with short compact joints, apex slightly 
dusky: thorax short, nodose, posterior node shortest, and transversely 
subcompressed ; legs more robust than usual ; abdomen subglobose, the 
third and following segments black, the first segment considerably dilated 
at apex ; ovipositor very short. Length .12 inch. 
Hab.—Tllinois. A very distinct species from its compact robust form, 
and is distinguished at once from canadensis by the head being concol- 
orous with the thorax. 
8. PEZOMACHUS DIMIDIATUS. JV. sf.— © .—Honey-yellow, more or 
less tinged with rufous; antennæ long, slender, yellowish beneath, dusky 
above ; nodes of thorax subequal, the anterior one with a medial longi- 
tudinal groove; legs concolorous with thorax, tips of coxze, trochanters 
and knees yellowish, posterior tibiz dusky at tips; abdomen ovate beyond 
first segment, convex, shining ; first and second segments dull honey- 
yellow, apex of second yellowish, third and remaining segments dark 
brown or rufo-piceous, sometimes the third segment is pale brown ; first 
segment rather suddenly dilated behind middle; ovipositor about one- 
third the length of abdomen. Length .17 inch. 
Hab.—Massachusetts ; Illinois. ‘Two specimens. 
g. PEZOMACHUS GRACILIS. JV. sf.— 9.—Honey-yellow, more or less 
tinged with rufous ; antenne long, slender, yellowish throughout ; thorax 
as in dimidiatus, except that the anterior node has no median sulcus ; 
legs long and slender, entirely yellowish ; abdomen shaped as in dimidt- 
atus, except that the first segment is more gradually and less dilated at 
apex, honey-yellow and yellowish at tip; second segment fuscous, with 
apical margin yellowish ; third and fourth segments fuscous, sometimes the 
apical margin of the latter faintly yellowish ; apical segments dull yellow- 
ish ; ovipositor longer than first abdominal segment. Length .20 inch. 
Hab.—Pennsylvania. ‘Two specimens. 
