MICROPORUS,—THYREOCORIS, a) 
punctate,” as in Uhler’s species, but obscurely wrinkled and thickly punctate. The punc- 
tured lateral borders of the pronotum also differ from the description of M. obliquus. 
LOBONOTUS. 
Lobonotus, Uhler, Bull. U.S. Geol. & Geog. Surv. vol. iii. pp. 8367 & 395 (1877). 
As Prof. Uhler remarks, this is the most singular and aberrant of all the forms 
of the North-American Cydnine. The elongated and produced head renders this genus 
very distinct. One species only is at present known. 
1. Lobonotus anthracinus. (Tab. IV. fig. 7.) 
Lobonotus anthracinus, Uhler, Bull. U.S. Geol. & Geog. Surv. vol. i. p. 3957. 
Hab. Texas.—MeExico 4 (Mus. Berol.). 
Uhler remarks that only two specimens of this species have as yet been secured. A 
third from Mexico is in the Berlin Museum, and is the specimen figured. 
| CANTHOPHORUS. 
Canthophorus, subg. Canthophorus, Mulsant et Rey, Pun., Pent. p. 54 (1866) ; Stal, En. Hem. pt. 5, 
p. 22 (1876). | 
Sehirus, Uhler, Bull. U.S. Geol. & Geog. Surv. ii. p. 396 (1877) ; Dall. (part.) List Hem. p. 127 
(1851). 
This genus is easily separable from all those previously enumerated by the less flat- 
tened and less spinous condition of the fore tibie. 
1. Canthophorus cinctus. 
Pentatoma cinctus, Palisot de Beauv. Ins. p. 114, Hem. pl. 8. f. 7. 
Cydnus ligatus, Say, New Harm. Ind., Dec. 1831; Compl. Writ. i. p. 322. 
Sehirus albonotatus, Dall. List Hem. i. p. 127. 
Sehirus cinctus, Stal, Hem. Afr. i. p. 29 (note) ; Uhler, Bull. U.S. Geol. & Geog. Surv. ii. p. 281, 
iii. p. 397; Proc. Boston Soc. Nat. Hist. xix. p. 872°. 
Cantophorus cinctus, Stal, En. Hem. pt. 5, p. 22. 
Hab. Nortu America, “almost whole country east of the great basin”!; Canada!.— 
Mexico !, Oaxaca (Mus. Berol.). 
According to Prof. Uhler the females usually have a sublunate white spot near the 
postero-exterior corner of the corium. Mr. Say appears not to have known the female 
of this species; for he makes the absence of the white spot a specific difference, ‘“ Spe- 
cimens occur with no spots on the corium, with the spots reduced to mere poinis, or 
with a spot only on one wing-cover.” ‘The specimens examined from Mexico are with- . 
out the spot on corium. | | 
THYREOCORIS. | 
Thyreocoris (p.), Schrank, Faun. Boie. nu. p. 46 (1801) ; Hahn, Wanz. ii. p. 47 (1834); Stal, En. 
Hem. v. p. 22 (1876). . 
BIOL. CENT.-AMER., Rhynch., April 1880. 2 
