TRICHOPEPLA.—THYANTA. 65 
Hab. Norta America, Pennsylvania!, New Jersey °, North Carolina‘, Texas 3°, East 
Florida?, whole Atlantic region °.—Mzexico (coll. Sign.). 
In Herrich-Schiaffer’s figure the lateral pronotal borders are apparently too much 
sinuated. Townend Glover’s figure is too faint and obscure for any practical purpose. 
Dr. Signoret informs me that he has received this species from North America under 
the apparently unpublished name of 7’. kirbyi, Fitch. 
PERIBALUS. 
Peribalus, Mulsant et Rey, Pun. France, pp. 237, 262 (1866); Stal, Ofv. Vet.-Ak. Foérh. 1867, 
p. 529, 1872, p. 37. 
Dryocoris, Mulsant et Rey, Pun. France, pp. 237, 267 (1866). 
This genus is common to both the Palearctic and Nearctic regions, one species being 
recorded from Mexico. 
It is easily separated from the preceding genus by the absence of pilosity, and the 
broader head (which is rounded in front), &c. The other characters, more special and 
minute, cannot be detailed comparatively here, except by a conspectus of the whole of the 
allied genera, which is undesirable in this portion of the work. 
1. Peribalus limbolarius. (Tab. VI. fig. 19.) 
Peribalus limbolarius, Stal, En. Hem. ii. p. 34. 1’; Uhler, Bull. U.S. Geol. & Geogr. Surv. iii. p. 4037. _ 
Peribalus modestus, Uhler, U.S. Geol. Surv. Montana, pt. iv. Zool. & Bot. p. 396°; Bull. U.S. 
Geol. & Geog. Surv. ii. p. 289%. 
Hab. Norta America, New York}, Illinois!, Texas!4, Kansas, Arizona?4, Colo- 
rado 234, California 4-—Mexico ¢. | 
The specimen figured is from Mexico, and in the collection of the Stockholm Museum. 
Prof. Uhler found this insect rather common, in the nymph stage, upon several kinds 
of flowering plants in August. He describes it as varying ‘in the amount of black 
upon the two last joints of the antenne, in the presence, or not, of black upon the 
acetabular caps, and in the blackish reticulation upon the corium.” 
THYANTA. 
Thyanta, Stal, Rio Hem. ii. p. 58 (1862) ; Ofv. Vet.-Ak. Férh. 1867, p. 529. 
This genus is confined to the Nearctic and Neotropical regions. It is represented in 
the Antilles, and is found as far north as New York, and as far south as Chili and 
Buenos Ayres. By Stal it is chiefly distinguished from the preceding genus by the 
relative length of the lobes of the head, “jugis et tylo eque longis vel hoc illis paullo 
longiore.” 
BIOL. CENT.-AMER., Rhynch., December 1880. 9 
