408 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
black in part ; intermediate and posterior coxae with much black ; pro- 
no tum largely black nortoni Smulyan, p. 428. 
10. A yellow line from nearly the posterior margin of head along inner orbit to 
about middle of eye; dorsal surface of thorax beyond collar much marked 
with yellow; posterior femora ferruginous, black, and yellow 
formosa (Norton), p. 439. 
Only a short yellowish line at the summit of the inner orbit; dorsal surface 
of thorax beyond collar with no yellow markings; posterior femora 
yellowish and black eximia (Norton), p. 437. 
11. Legs in part ferruginous: black, yellowish, or straw color, and ferrugi- 
nous 12. 
Legs without ferruginous: black, and yellowish, or straw color. Coxae 
black except anterior sometimes in part; posterior femora, pectus and 
mesopleura, lobes of collar, and tegulae, black 
semirubra (Norton), p. 450. 
12. Coxae wholly or in greater part yellowish; pectus entirely or in part, 
mesopleura in part, posterior dorsal margin of lobes of collar, and tegulae, 
yellow, or yellowish signata (Norton), p. 447. 
Coxae wholly or in greater part black; pectus, mesopleura, lobes of collar, 
and tegulae, black mulans (Norton), p. 451. 
DESCRIPTIONS OF SPECIES. 
I have deemed it advisable to redescribe the species of other 
authors in every instance. The bibHography, as far as I know, 
is complete in every instance and consists merely of reference to a 
species; an interrogation mark before the reference indicates 
doubt, the writer not having seen the specimens in question. 
Mere references to habitat or distribution are cited in connection 
with habitat, and the name of the writer who is responsible for 
such a reference follows in parenthesis. Whether these last are 
in all cases correct is a question. I venture to say that, in some 
instances, at least, they are not, owing to incorrect determinations. 
Tenthredella grandis (Norton). 
Allantus grandis Norton, Boston Journ. Nat. Hist., vol. 7, 1860, p. 239, n. 7, 9 . 
Tenihredo grandis Norton, Trans. Amer. Ent. Soc, vol. 2, 1868-9, p. 227, n. 
1, 9 &. 
Tenihredo grandis Provancher, Nat. Can., vol. 10, 1878, p. 195, n. 1, 9 cf • 
Tenihredo grandis Provancher, Faun. Ent. Can., vol. 2, 1883, p. 221, n. 1, 9 cf . 
Tenihredo dubitatus MacGillivray, Journ. N. Y. Ent. Soc, vol. 5, 1897, p. 103, 
9. 
Tenihredo dubiiaia MacGillivray, Bull. Conn. Geol. and Nat. Hist. Surv., no. 22, 
1916, p. 83-84. 
Tenihredo grandis MacGillivray, Bull. Conn. Geol. and Nat. Hist. Surv., no. 
22, 1916, p. 84. 
