60 IOWA STUDIES IN NATURAL HISTORY 
vum is strongly banded with yellowish, the black being con- 
fined to the incisures; some specimens have the entire margin 
of the connexivum pale. The punctuation varies also in dif- 
ferent specimens but, in general, it is ordinarily finer than in 
B. quadripustulata thus leaving the yellowish rugae between 
less prominent than in that species. 
I have been unable to place any of my lowa specimens of 
Brochymena in this species. Professor Osborn listed it as com- 
mon in Lowa: (Proce. Ta. Acad. Sa, 1 Pte) i292) = ut ot 
am inclined to think that the species to which he there refers is 
B. quadripustulata. B. carolinensis seems to be comparatively 
rare and confined to eastern and southeastern United States. 
Van Duzee says, ‘‘It is more abundant toward the south, my 
material showing a range from southern New York to Florida.’’ 
(l. ¢. 31). Alabama and Florida specimens are in my collec- 
tion. 
Tribe PENTATOMINI (Stal) 
This is the largest tribe in the family Pentatomidae and con- 
tains in the neighborhood of 1,500 forms, approximately 400 
of which are found in America. North America is represented 
by about 125 forms disposed in 33 genera; of these, 31 forms 
placed in 18 genera are recorded from Iowa. - The principal 
characters of the group follow: 
Body more or less ovate. Head usually only slightly convex on dorsal 
surface; juga without lateral tooth and usually not longer than tylus. 
Abdomen without longitudinal ventral sulcus. Secutellum generally mod- 
erate but extending much beyond frena. Tarsi of three segments (except 
in one Oriental genus in which there are two segments). 
Key to the genera 
1. Second visible ventral segment of abdomen armed with a 
median spine or obtuse tubercle directed anteriorly... .16 
Second visible ventral segment of abdomen unarmed.... 2 
2. Odoriferous orifices a little outside lateral margins of mid- 
dle coxal cavities; not elevated or continued in a suleus; 
lateral margins of juga reflexed and much thickened; head 
strongly deflexed, front nearly vertical....Murgantia (15) 
Odoriferous orifices far outside lateral margins of middle 
coxal cavities or elevated or continued in a suleus; lateral 
