NANNIUM. 85 
under it, in addition to NV. parvum, two South-American species with a differently 
formed pronotum. ‘he above-mentioned characters are taken from N. dituberculatum 
and N. parvum only. 
1. Nannium bituberculatum, n. sp. (Tab. VI. figg. 8,¢; 8a, antenna.) 
3. Subparallel, moderately long, nigro-piceous, the tips of the antenne, the basal third of the tibia, and the tarsi 
testaceous; the ridges on the pronotum, scutellum, and corium, and the apical margins of the connexival 
segments, set with very short, stiff, inconspicuous hairs. Head coarsely granulate, with two short parallel 
ridges on the dise behind, the post-ocular portions rounded, the spiniform antenniferous processes slightly 
divergent, the apical process feebly emarginate at the tip; antenne with joints 1 and 2 stout, 3 nearly 
twice as long as 2, 4 about as longas1. Pronotum coarsely granulate; the anterior portion with two 
very prominent tubercles on the disc, the lobiform anterior angles raised and very prominent, obtuse at - 
the tip ; the posterior portion fully one-half wider than the anterior portion, and wider than the abdomen, 
narrowly reflexed at the sides anteriorly, the transverse trisinuate ridge prominent. Scutellum with the 
oblique ridge on each side terminating in a tubercle in front, the median carina prominent. Connexivum 
with the outer apical angles of each segment angularly projecting, the apical margins of segments 1—4 
raised ; the genital lobes moderately stout; the spiracles prominent. 
Length 3,4,, breadth 1} millim. 
Hab. Guatemata, Cerro Zunil (Champion). 
One example. Differs from the following species in the stouter antenne, the rounded 
and unarmed post-ocular portions of the head, the much more prominent pronotal 
tubercles, the bituberculate scutellum, and the more angularly projecting outer apical 
angles of the connexival segments. 
2, Nannium parvum. (Tab. VI. figg. 11,¢; 12,9, from beneath.) 
Nannium parvum, Bergr. Ent. Monthly Mag. xxxiv. p. * 
Subparallel ( g ), oblong-ovate (2), varying in colour from nigro-fuscous to fuscous or ferrugineo-fuscous, the 
membrane inclining to testaceous at the base; the elevated portions of the head, pronotum, and scutellum, 
and the apical margins of the connexival segments, closely set with very short, stiff, fulvous hairs. Head 
finely granulate, with two short, posteriorly converging ridges on the disc behind, the post-ocular portions 
armed with a short tooth, the spiniform antenniferous processes slightly divergent, the apical process feebly 
emarginate at the tip; antenne with joints 1 and 2 moderately stout, 3 rather slender, one-half longer 
than 2, £ about as long as 1. Pronotum finely granulate; the anterior portion with two rather large 
tubercles on the disc, the lobiform anterior angles moderately prominent, rounded at the tip; the posterior 
portion wider than the base of the abdomen, narrowly reflexed at the sides anteriorly, the transverse 
trisinuate ridge prominent. Scutellum sharply carinate down the middle. Connexivum with the apical 
margin of each of the segments 1-5 somewhat prominent, rounded at the sides in the female, the outer 
apical angles of segments 4-6 rather prominent in the male; the genital lobes stout in the female, more 
slender in the male. Beneath rugosely punctured, the abdomen with rows of flattened callosities on each 
side, the segments 1-5 with a smooth spot in the middle; the orifice very prominent. 
Length 22-33, breadth 1-12 millim. . 
Hab. Guatemata, El Tumbador (Champion: 3); Panama, Bugaba, Volcan de 
Chiriqui (Champion: ¢ 92 ).—VENEZUELA 1. 
Six specimens. Varies in size and colour, pale examples appearing to have the legs 
subannulate. Dr. Bergroth’s type (¢) is from Venezuela. A male from Guatemala 
and a female from Chiriqui are figured. 
