372 
The Ohio Naturalist. 
[Vol. VIII, No. 8, 
revision in the hands of a competent hemipterist disposing of 
ample materials. But from our present scanty knowledge of 
them to this desideratum is a long step. 
Trepobates pictus H. Sch. 
Several specimens of the apterous form from Amatitlan, Agua 
Caliente and Mazatenango, and two macropterous specimens 
from Gualan. 
This is a very variable insect. Most of the Guatemalan ap¬ 
terous specimens have the mesonotum black with two longitudi¬ 
nal curved-yellow bands turning their convexity outwards. Spec¬ 
imens from Phoenix, Arizona, and Sligo Glen, Maryland, are 
similarly colored. In a few of the Guatemalan specimens the 
mesonotum is entirely black or nearly so, and of this variety I 
have a specimen from Florida. In specimens from Glen Echo, 
Maryland, there are four curved bands forming on either side 
of the mesonotum a rather irregular yellow O which sometimes 
is incomplete with the ends open, and there is also an oblique 
yellow streak near the apical angles. I am unable to find any 
reliable plastic differences between these varieties. 
The hemelytra of the winged form have been described by 
Uhler in Proc. Zool. Soc. London, 1894, p. 213-214. In this 
form the posterior triangular process of the pronotum is margined 
with yellow and the whole antehumeral part of the pronotum has 
an intralateral yellow' vitta which usually joins the yellow mar¬ 
gin of the process but which in some specimens is abbreviated 
posteriorly ; sometimes there is also an oblong median yellow spot 
near the apical pronotal margin. The sooty black wings are 
shorter than the hemelytra but considerably longer than the 
abdomen and are not folded under the hemelytra. The apical 
margin of the corium is well marked, except at the inner angle, 
and placed at right angles to the costal margin and to the longi¬ 
tudinal axis of the body when the hemelytra are closed. The 
inner vein of the corium is shortly furcate at the apex. The pale 
longitudinal vitta of the membrane, mentioned by Uhler, is very 
obscurely indicated in most specimens. The median vein of the 
membrane is fold-like and usually reaches the apex of the loop 
formed by the elevated outer and inner vein. 
Trepobates pictus exactly agrees with the short generic des¬ 
cription 1 of Callistometra Kirk. According to Kirkaldv this 
genus differs from Trepobates Uhl., “in the incrassation of the 
anterior femora, in the straightness of the posterior margin of the 
mesonotum, etc.” The incrassation of the anterior femora is, 
1. In the statement, “suture between meso- and meta-stemum 
straight,” metanotum is apparently to be read instead of melastemum; 
this confusion of the sterna and the not a is frequently met with in the 
descriptions of this author. 
