Holotype: f, PANAMA, San Blas: (Nusagandi, Ina Trail, 250–350 m a.s.l.), 26.vii.1995, C. W. & L. B. O’Brien, (JEE). Deposited in: AMNH, USA.

Etymology: The name refers to the size of the species. Latin: grandis, big.

Diagnosis: Black with concolorous punctures. Posterior margin of head and anterior margin of pronotum with yellowish spots. Body surface densely pubescent.

Head with small, sparse, brown spots on juga and vertex; yellowish spot on posterior margin, smaller than ocellus; punctures not confluent on apical third of juga. Vertex slightly tumid. Antennal segments I– III black, IV– V brown. Setae uniformly distributed on antennae. Proportional length of antennal segments: I > II < III > IV < V; third the longest. Buccu- lae lacking anterior tooth. Rostrum black, pubescent, reaching anterior margin of urosternite V; proportional length of labial segments: I < II > III < IV.

Pronotum with yellowish spot at middle of anterior margin. Cicatrices flat. Punctures rough, more sparse on disc. Anterolateral angles projected anterolaterally exceeding lateral limit of eyes by the ocellus width. Anterolateral margins slightly sinuous. Scutellum attaining posterior margin of connexival segment V; punctures not confluent on postfrenal lobe. Corium reaching middle of connexival segment VI; subtle, yellowish spots interspersed with punctures. Spot at apex of radial vein as wide as ocellum. Membrane with 12 veins, reaching apex of abdomen. Pleurae with sparse, yellowish spots. Peritreme surpassing half the width of evaporatorium. Coxae and trochanters yellowish with coppery areas; femora and tibiae black; tarsi coppery.

Connexivum with yellowish spots at midpoints of segments IV- VII. Abdomen with deep punctures; yellowish spots, punctures, and setae more dense on lateral thirds and inconspicuous on disc; trichobothrial tubercles brown. Anteromesial margin of spiracles flat, yellowish.

Male. Unknown.

Female. Measurements (N = 1): head length 2.39; width 2.96; pronotum length 3.21; width 7.37; scutellum length 5.17; width 4.41; length of antennal segments: I 0.95; II 0.69; III 2.39; IV 1.70; V 2.02; length of labial segments: I 1.39; II 2.71; III 1.89; IV 1.51; total length 13.80; width of abdomen 8.30.

Genitalia. Genital plates pubescent. Gonocoxites 8 wider than long; posterior margins sinuous, slightly concave medially, projected over the base of laterotergites 9; mid callus on disc. Spiracles of laterotergites 8 on ample callus delimited by few punctures, placed lateral to lateral angle of gonocoxites 8. Gonocoxites 9 scarcely exposed, triangular, with longitudinal suture. Laterotergites 9 not surpassing the band connecting laterotergites 8; median margins on a higher plane than lateral margins; lateral basal angle flat (Fig. 6B).

Comments: Alitocoris grandis sp. nov. is in polytomy with Ali. lateralis sp. nov. and Ali. schraderi (Fig. 1). It can be distinguished by the larger size, the presence of a yellowish spot at the middle of the posterior margin of the head, the presence of pubescence on the body. The concavity of the posterior margin of gonocoxites 8 is shallower than in Ali. schraderi and Ali. lateralis sp. nov.