HETEROSCELIS.—PERILLUS. 33 
Two species only are known—one recorded from North Brazil, and the other from 
Mexico. | 
Considerable doubt exists as to the right nomenclature of this genus. Latreille 
first described Heteroscelis as a genus of Coleoptera (Régn. Anim. 1829, ii. 18), and 
again later in the same work as a genus of Hemiptera. Spinola therefore substituted 
for the last the name of Phyllocheirus, which Amyot and Serville subsequently rectified 
to Phyllochirus. Stal, however (En. Hem. i. p. 31), has resuscitated the name of 
Heteroscelis ; and coleopterists have rejected the name on the ground of it having been 
previously used in Rhynchota. The only reason for this last course appears to be that 
Latreille had previously (Fam. du Régn. Animal, 1825, p. 419) mentioned or proposed 
the name Heteroscelis as a genus of Hemiptera, without diagnosis, only enumerating 
that name with seven other generic names under the classification of “‘Antennes de 
cing articles.” As, however, coleopterists have rejected the name apparently for this 
reason, I have followed Stal in using Latreille’s generic name. 
1. Heteroscelis lepida. (Tab. III. fig. 21.) 
Phyllochirus lepidus, Stal, Stett. ent. Zeit. xxii. p. 93. 40°. 
Bodetria scutellaris, Walk. Cat. Het. iii. p. 5297. 
Heteroscelis lepida, Stal, En. Hem. i. p. 31. 2. 
Hab. Mexico 1, Vera Cruz ?. 
PERILLUS. 
Perillus, Stal, Stett. ent. Zeit. xxiii. p. 88 (1862); Ofv. Vet.-Ak. Férh. 1867, p. 496. 
Of the seven species which at present constitute this genus, three are found in 
Central America, and the other four are peculiar to the Nearctic Region. 
In structure Perillus is allied to Oplomus ; but the scutellum is much more narrowed, 
and the ventral spine only reaches the posterior coxe. 
1. Perillus confluens. (Tab. I. fig. 18.) 
Asophus confluens, H.-S. Wanz. Ins. v. p. 77, fig. 522°. 
Oplomus (Perillus) confluens, Stal, Stett. ent. Zeit. xxiii. p. 88. 27°. 
Perillus confluens, Stal, En. Hem. i. p. 82. 1°; Uhler, Bull. U.S. Geol. & Geog. Surv. ii. p. 282. 44, 
Hab. Norva America, Texas, New Mexico 4.—Mexico 123, Oaxaca (Mus. Berol.); 
Brit. Honpuras, R. Sarstoon (Blancaneaux); GuatemMaLA, Capetillo, Duefias, San 
Gerénimo (Champion) ; Costa Rica (Van Patten). 
Var. a. 
Body beneath sanguineous. Pronotum with the anterior and lateral margins and submarginal fascia at 
humeral angles, scutellum with lateral angles and apical half sanguineous. 
Var. 0. 
Differing from var. a in having only the anterior and lateral borders of the pronotum sanguineous; scutellum 
unicolorous. 
BIOL. CENT.-AMER., Rhynch., June 1880. | 5 
