1917] Gibson—Key to the Species of Leptoglossus Guér. 69 
KEY TO THE SPECIES OF LEPTOGLOSSUS GUER. 
OCCURRING NORTH OF MEXICO (HETEROPTERA; 
COREID #4). 
By Epmunp H. Grsson, 
Bureau of Entomology, Washington, D. C. 
The cosmopolitan genus Leptoglossus Guér. is represented in 
America, north of Mexico, by nine species all of which are listed 
in Van Duzee’s recent check list. Specimens bearing labels of two 
other species, namely balteatus Linn. and stigma var. minor Dall. 
are in the collection of the U. S. National Museum, but I believe 
them to have been wrongly determined. 
This genus belongs to the tribe Anisoscelini A. & S. and may be 
separated from Chondrocera Lap. and Narnia Stal, the other 
two genera of the tribe which are known to occur in North America, 
by the large dilations of the hind tibiz and simple antennze which 
have their basal joint long. 
In working out the key to the species, color markings have been 
eliminated as far as possible. Specimens of each species have been 
examined and in practically each one access has been had to large 
series, which are in the collection of the U. S. National Museum. 
Leptoglossus Gueér. 
Leptoglossus Guér., Voy. de la Coquille, Ins., p. 174, 1838. 
Anisoscelis Spin., Ess. Hem., p. 200, 1837. 
Theognis Stal, Stettiner, Ent. Zeitg., xxiii, p. 294, 1862. 
Leptoglossus Guér. may be characterized as follows: Head 
elongate, horizontal. Antenne rather stout but not swollen or 
‘dilated, basal joint long, about equal to length of the head; rostrum 
passing the metasternum; buccule short. Thorax longer than 
head, broad and rounding posteriorly. Elytra narrowing towards 
apex. Hind femora more or less swollen; hind tibiz with large 
dilations of foliations, the outer margins of which are usually more 
or less deeply scalloped. Spiracles at base and apex of abdomen 
about equally remote. 
The haplotype of the genus is dilaticollis Guér. 
