(Figs 1A, 2A, 3A, 4A and 5A)

Macrotingis biseriata Champion, 1897: 22; Froeschner, 2003: 29.

Macrotingis biseriata biseriata: Drake, 1928: 4; Drake & Ruhoff, 1965: 294.

Diagnosis. Head red brown; rostrum long, reaches the meso-metasternum; pronotal disc with three carinae; paranota with two rows of areolae, areolae in outer row bigger than those in inner row; thoracic sterna black; mesosternal rostral laminae converge gradually posteriorly; costal area with two rows of areolae; abdomen bicoloured, pre-genital segments black, genital segments red brown.

Redescription. Total body length (females N = 5 and males N = 5, respectively): 5.25–5.66 (5.39) 5.19–5.59 (5.41). General colour yellow brown. Head red brown. Cephalic spine slender, erect, covered with disperse, long, erect setae (Figs 2A, 3A). Clypeus reddish brown or dark brown. Bucculae yellow, with three rows of areolae, similar width over all its length. Rostrum yellow except for the brown apex, long, reaches the meso-metasternum. Antennae 1.2 to 1.3 times the length of the body; segment Ibetween 5.0 and 6.1 times the length of the head, with abundant long, semi-erect setae; segment II subconic, glabrous; segment III with abundant long semidecumbent setae and some short semierect setae; segment IV with abundant long, semidecumbent setae and some scattered short, semierect setae.

Pronotal disc red brown, coarsely pitted, three carinae (Fig. 4A). Hood projects as far as anterior half of eyes, surface with long, semi-decumbent scattered setae (Fig. 3A). Callus dark brown, depressed, with abundant long, semidecumbent setae. Paranota sub-vertical, margins serrated with long disperse setae; with two rows of areolae, areolae in outer row bigger than those in inner row. Posterior process yellow. Thoracic sterna black. Rostral laminae: mesosternal laminae convex, maximum separation in anterior third, converge gradually posteriorly; metasternal laminae longer than space separating both laminae.

Hemelytra (Fig. 5A): costal area subhorizontal, with two rows of areolae, areolae big, especially posteriorly. Subcostal area with four rows of medium sized areolae. Discoidal area at widest part with four rows of small areolae.

Abdomen bicoloured, pre-genital segments black, genital segments reddish brown.

Type material examined. Paralectotypes: 1 ♀ and 2 ♂, Panama, V. De Chiriqui 25–4000 ft, B.C.A. Rhyn II Macrotingis biseriata Champion (BMNH); 2 ♀, 1 ♂ and one specimen ND, same label (IRSNB); one specimen ND, same label (NMNH). Other material examined. 2 ♀ and 2 ♂, Panama, El Valle, Alt. 2000 ft Río Chorros, Quebrada Amarilla, 7.v.1937, R. Bliss, M. biseriata det. Champion (NMNH).

Distribution (Fig. 7). Costa Rica (Froeschner, 2003), Honduras (Drake, 1928) and Panama (Champion, 1987).

Discussion. Macrotingis biseriata can be distinguished from the other members of the genus by its very long rostrum, which reaches the meso-metasternal suture, and it’s entirely biseriated costal area. In the rest of the species the rostrum reaches the posterior half of the mesosternum and the costal area is uni-biseriated or entirely uniseriated.