174 
it may also feed on the sap. We have never seen any with their beaks 
inserted, but H. Garman, while an assistant at the State Entomologist’s 
office, found them very abundant on apple trees injured by twig punc- 
tures. We have taken them hibernating in December; they occur abun- 
dantly on apple, oak, elm, and other trees in May and June; and the 
nymphs in our collection were taken in late June, July, and August. The 
adults on apple trees, mentioned above, are perhaps the hibernating gener- 
ation, the next generation being that taken by us in August, September, 
and October. Localities are as follows: Milan and Andalusia in Rock 
Island county; Urbana, Peoria, Havana, Griggsville, and Pegrim; Col- 
linsville, Olney, Clay City, Flora, Odin, Centralia, Richview, Dubois, 
Du Quoin, Mt. Vernon, Carbondale, Grand Tower, Cobden, Anna, 
Pulaski, and Villa Ridge, in southern Illinois, the dates being April 7, 17, | 
19, 20; May 15, 18, 19, 21, 23, 24, 26, 27, 30; June 1, 4, 6, 8, 10, 13, 21, 
26, 29;July 8, 17, 25; August 13, 14; September 2, 11, 14, and 20; and 
October 15, 31. Eggs of Brochymena, probably of this species, or of 
arborea, we have collected in late June, and from these we bred two 
parasites, determined for us by the U. S. Bureau of Entomology as 
Anastatus sp. and Trissolcus murgantiae Ashm. 
Subfamily PENTATOMINAE 
Key To TRIBES 
NYMPHS 
Juga broad, surpassing tylus and in close contact beyond it for a distance about 
equal to the width of a jUgum....... 0.00. . ec ewseccccsssceesssenses EDESSINI. 
Juga slender, straight, subacute, surpassing tylus by at least the width of a 
jugum, nearly or quite in contact beyond it; body elongate......... MECcIDIINI. 
Juga sometimes surpassing tylus, but by much less than a jugal width, and not 
in! CONTACL SPE YOM VAT sic creer crs eaters alate lap) wisye chavel<Letenatalat ene) ol wieierarety PENTATOMINI, 
IMAGINES 
First rostral not evident between the bucculae anteriorly, apparently emerging 
behind the middle of the head, attaining the fore coxae....... DISCOCEPHALINI. 
First rostral resting about parallel to the under surface of head, its basal end 
evidently in front of middle of head. 2 
Body regularly ovate, broadest behind middle, margins all explanate; sides 
of tergum rather broadly exposed........--.--seegeereeeecnetes ScIocoRInI. 
Body usually broadest at lateral angles of pronotum, margins not uniformly 
explanate; sides of tergum narrowly or not at all exposed. 
Metasternum with a median smooth elevated area, strongly notched behind 
to receive the ventral spine, and prolonged forward as a bifid process; 
juga usually meeting broadly in front of tylus (Trop. Am., Fla. to La.)... 
HUDDLE AUD OSS OURAUS ORO DOOM OOO NOOO ACOs Maude +a ceoae aba ds EDESSINI. 
Metasternum with not more than a simple median carina. 
Venter with first three segments each side of middle bearing a curved 
stridulatory band, finely and densely cross-striate; body elongate, about 
four times as long as its greatest breadth (Mecidea)......... MECIDIINI. 
