197 
[Head much shorter than pronotum, the latter with at most 1 protuberance 
on lateral angle; eyes usually contiguous to anterior margin of pro- 
notum.] 
Second ventral in side view with distinct spine or tubercle projecting ante- 
riorly towards or between hind coxae. 
Fourth rostral about as long as third; above gray to brown.4. Apateticus.* 
Fourth rostral about twice as long as third; above black with red or 
EULER, IS RSET ce) 2 er 2g fas romabatia de aka svar zane daiwa Nat aetdis boiiasiad/ayle.atva, yeye%ess\'a a; 5. Mineus. 
Second ventral in side view with not more than a slight obtuse angulation 
at middle. 
Juga not meeting in front of tylus; osteole with distinct curved pro- 
longation; bucculae not overhanging behind. 
Second rostral 1/2 longer than third; metallic dark blue above........ 
RERYRCI ears alien sane Te ohnsee ae Pebntobsaeehenalnte RimEsKs evo ner cienis (oat st oh aye) ap SiePayetaroneye aks 6. Zicrona. 
Second rostral more than twice as long as third; metallic blue to green 
above, with red to brown markings (Pa., Tenn., and southward, Trop. 
ENT ace tayerk, Shetek geist be bidimheuseis, si BiadcdansYebrareie a\sieveceyelene <8 Buthyrhynchus Dall. 
Juga meeting in front of tylus; osteolar prolongation subobsolete; buc- 
culae strongly elevated, in side view overhanging behind.............. 
Ed cate otters iatetar aie rch tieisas le case Sines eo aitesar a ack aha acaveta ele ale: 7. Rhacognathus. 
1. Srirerrus Lap. 
STIRETRUS ANCHORAGO, var. FIMBRIATUS Say 
Tetyra fimbriata Say, Am. Ent., Vol. 3, 1828; Compl. Writ. Ent. N. A., Vol. 
it, p93: 
The species occurs in the Southern States, ranging north as far as 
Iowa and Massachusetts, and south to Panama. It is uncommon in IIli- 
nois so far as our experience goes. There are several specimens from 
northern Illinois in the Bolter Collection, and we have it from Algonquin 
(N. Ill.; Nason), Charleston (C. Ill.; C. C. Adams), and Thebes (S. IlL.; 
C. A. Hart), July 3 and August 23. The variety violaceus is known from 
Pennsylvania, and should be looked for in southern Illinois. 
2. Peritius Stal 
The species of this genus are black, varied with reddish, and marked 
with red, carmine, or pale yellow, notably a pale or red U- or V-shaped 
scutellar border. My material is not any too extensive, as the species 
are not usually abundant; but the pattern seems fairly constant, and I 
have ventured to use it freely in the following key. 
Key To SPECIES 
Pronotum with anterior transverse black bar not interrupted at middle; costal 
border of corium pale; femoral spine a small tooth or tubercle, not longer 
than thick; basal margin of scutellum black................. ns aetaliveel eraptus. 
[* See Addenda for generic subdivisions.] 
