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 \-ery 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 hemelvtra of the winged form have been described bv 

 Uhler in Proc. Zool. Soc. London, 1894, p. 213-214. In thi's 

 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 hemeh'tra. The apical 

 margin of the corium is well marked, except at the inner angle, 

 .and placed at right p,ngles 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 ^'cin. 



Trepobates pictus exactly agrees with the short generic des- 

 cription^ of Cdllistometra Kirk. According to Kirkaldy 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-sternum 

 straight," metanotum is apparently to l)e read in.stead of metasternum; 

 this confusion of the sterna and the nota is frequently met with in the 

 descriptions of this autlior. 



