NEUROCTENUS.—ANEURUS. 118 
joints 1-3 subequal in length and 4 shorter than 3; the post-ocular spines extend 
outwards to a little beyond the eyes; the pronotum is feebly sinuate at the sides; the 
connexivum is rather narrow and faintly longitudinally carinate towards the outer 
margin. One of the types, a female, has been examined ; it has the terminal genital 
segment deeply notched at the apex, as may be seen by a reference to our figure. 
14. Neuroctenus subparallelus, n.sp. (Tab. VII. figg. 25, 2; 25a, antenna.) 
2. Elongate, narrow, parallel or subparallel, dull, black, the tips of the antenne, the coxe and tarsi, and 
sometimes the apical margins of the connexival segments, more or less ferruginous, the membrane with 
two obscure luteous spots at the base; the upper surface granulate, the connexivum finely rugulose. 
Head somewhat rounded at the base; the apical process long and stout, extending fully as far as the apex 
of the first antennal joint, notched at the tip; the spiniform antenniferous processes short; the post- 
ocular portions armed with a short spine; antenne short and stout, joints 1-3 subequal in length, 4 ovate, 
stouter and considerably longer than 3. Pronotum trapezoidal, short, sinuate at the sides, the anterior 
angles rounded. Corium acute at the tip, the apical margin feebly bisinuate. Connexivum narrow, 
rounded at the sides posteriorly. Beneath dull and rugose; the venter rather convex, the segments each 
with a smooth, narrow, elongate-triangular spot in the middle behind; the fifth segment with the median 
portion of the apical margin feebly bisinuate. Terminal genital segment unemarginate at the apex. 
Femora granulate. 
Length 53-6}, breadth 13-2 millim. 
Hab. Muxico, Atoyac in Vera Cruz (Schumann); Guatemaua, Senahu and Cubilguitz 
in Vera Paz, El Tumbador (Champion). 
A single specimen from each locality. Belongs to Dr. Bergroth’s first section of the 
genus, but differs from all the species described in his Monograph by its narrow, parallel 
shape, in connection with the short, stout antenne, with long apical joint, and the rather 
convex, rugose venter. 
This insect is nearly allied to NW. longulus, Bergr., from Cayenne *; but it is smaller 
and less robust, with the apical joint of the antenne longer than the third, the 
post-ocular portions of the head armed with a short tooth, &c. The specimen from 
Cubilguitz is figured. . 
ANEURUS. 
Aneurus, Curtis, Brit. Ent. p. 86 (1825); Fieber, Europ. Hemipt. pp. 35, 116; Stal, Enum. 
Hemipt. iii. pp. 140, 146 ; Bergroth, Verh. zool.-bot. Ges. Wien, xxxvi. p. 58 (1886). 
The species of this genus are very similar in appearance, but, as a rule, easily 
distinguishable by the structure of the head and antenne, and the form of the terminal 
genital segment in the males. They may be readily recognized by their very flattened 
form, semicircular scutellum, membranous, undefined corium, the membrane without 
distinct nervures, and short wings. Dr. Bergroth (op. cit.) has characterized five 
neotropical species (one of which, A. westwoodt, Bergr., had been previously described 
by Walker under the name of Crimia marginalis); but of these one only appears to 
inhabit Central America, whence five are now recorded. 
* Bull. Mus. Paris, 1898, p. 150. 
BIOL. CENTR.-AMER., Rhynch., Vol. II., June 1898. 15 
