8 -HEMIPTERA-HETEROPTERA. 
length of the body; they are also more slender, with their spines weaker than in the 
genus Cyrtomenus. The corium is also shorter than the membrane. 
1. Ectinopus holomelas. 
Cydnus holomelas, Burm, Handb. ii. p. 375. 7+. 
Ectinopus holomelas, Dall. List Hem. p. 122. 1, pl. 2. fig. 5°; Stal, En. Hem. pt. 5, p. 20°. 
Aithus fusiformis, Walk. Cat. Het. i. p. 150. 20 *. 
Pangeus ? fusiformis, Uhler, Bull. U.S. Geol. & Geog. Surv. iii. p. 389. 
Hab. Mexico ?, Orizaba *.—CotomsBia 22; N. Braziu3, Para }. 
An examination of Walker’s type in the British Museum has shown that his thus 
fusiformis is a small and somewhat dull-coloured specimen of the genus Ectinopus, and 
that it cannot be separated from this species. 
MICROPORUS. 
Microporus, Uhler, Bull. U.S. Geol. & Geog. Surv. ii. p. 275 (1875), iii. pp. 366, 373 (1877). 
This genus at present contains but three species—one Nearctic, and the other two 
found in the Central-American subregion. The generic characters as enunciated by 
Prof. Uhler are :—“ Scutellum broadly rounded ; head with comb-teeth ; body deep and 
convex; ostiolar canal short, at tip enlarged into a circular auricle; surface hairy 
exteriorly.” 
1. Microporus testudinatus. (Tab. II. fig. 24.) 
Microporus testudinatus, Uhler, Bull. U.S. Geol. & Geog. Surv. vol. ii. p. 276’, vol. ili. p. 8747, 
Hab. Cautrornia !?.—MeExico?; GuateMa.a, Capetillo (Champion). 
The specimen figured is from Guatemala, and does not appear to differ from the 
Mexican or more northern representatives of the species. 
2. Microporus mexicanus, n. sp. (Tab. IV. fig. 8.) 
Piceous, shining. Head with the anterior portion obscurely channelled and wrinkled. Antenne with the 
three basal joints ochreous, the two apical ones luteous; second joint much the shortest; third, fourth, 
and fifth subequal. Pronotum: with a somewhat obscure transverse impression, behind which it is 
distinctly and somewhat densely punctate; the anterior portion of the pronotum has the lateral borders 
broadly and coarsely punctate, the anterior margin narrowly and more obscurely punctate, and the disk 
impunctate. Scutellum obscurely wrinkled, somewhat thickly punctate, with the base narrowly impunc- 
tate ; apex depressed and angularly rounded. Corium somewhat densely punctate, membrane pale whitish, 
Body beneath concolorous. Abdomen with the disk smooth; sides very finely and obscurely punctate. 
Fore and intermediate tarsi luteous ; hind tarsi luteous, with the apical joint piceous. 
Long. 5 millim., lat. basi pronot. 3 millim. ° 
Hab. Mexico (Mus. Berol.). 
Allied to IZ. obliquus, Uhler, but differs from the description of ‘that species in the 
following particulars :—It is much larger; the scutellum is not “polished, remotely 
