175 
Venter without finely striated stridulatory band each side near base; body 
not over three times as long as its greatest breadth....... PENTATOMINI. 
Tribe DISCOCEPHALINI 
Key To GENERA 
Head narrower than apical margin of pronotum; side of head with spinose pro- 
RMS AhION MLM TON GVOLe VOR stor. of aidiare inte arcuensvars) oye leis ore: bp cuevdcue axe 1. DrypTocEPHALA. 
Head as broad as apical margin of pronotum; side of head without spinose pro- 
LONE Ai ONwINT TOM ENGL GYCS ci stone re «plelo bias ovale Siateleve ae cle wiese eieta 2. PLATYCARENUS. 
1. DryproceEPHALA Lap. 
This genus I have added to the list of our fauna because of a nymph 
showing its peculiar head-structure, taken at Brownsville, Tex., Novem- 
ber 21. I have nymphs apparently of the same species from Valles, Mex., 
near Tampico. 
2. PLATYCARENUS Fieb. 
Two species of this genus are listed under Discocephala from Texas 
and Arizona respectively by Banks.* They belong to the subgenus Platy- 
carenus, which Kirkaldy lists as a genus. 
Tribe SCIOCORINI 
Scrocoris Fall. 
ScrocoRIs MICROPHTHALMUS Flor 
Sciocoris microphthalmus Flor, Rhynch. Livl. ete., Vol. 1, p. 114. 1860. 
This European species was taken on the White Mountains by Mrs. 
Slosson. In the Bolter Collection are two examples: one from Duluth, 
Minn. ; the other from the Lake Superior region. The species is labeled 
umbrinus, but seems quite certainly microphthalmus. 
Tribe EDESSINI 
The large neotropical genus Edessa is represented in our fauna; 
Florida to Louisiana. 
Tribe MECIDIINI 
It seems possible that this tribe, based by Bergroth on the presence 
of stridulatory areas, may prove not to be a natural group. 
MECIDEA LONGULA Stal 
Mecidea longula Stal, Of. Kongl. Vet.-Akad. Forh., Vol. 11, p. 233. 1854. 
This interesting, very elongate pentatomid is known from Texas, 
New Mexico, Colorado, and Iowa, and its occurrence in the sand areas of 
western Illinois is a possibility. 
* Cat. Nearctic Hemp.—Het., p. 92. 
