Phalaecus, STAL, 1862

Lupoli, Roland, 2019, The genus Phalaecus Stål, 1862 in French Guiana, description of P. carmini n. sp., and the female of P. lineatus Grazia, 1983 from Mitaraka (Hemiptera: Pentatomidae), Zoosystema 41 (3), pp. 21-28 : 27

KEY TO SPECIES OF PHALAECUS STÅL, 1862

1. Dorsal surface pale yellow with longitudinal light brown to ocher stripes on pronotum and scutellum; connexivum alternating light brown and pale yellow areas; antennomeres I to IV concolorous, apical half of V suffused with dark brown ............................................................................................. Phalaecus lineatus Grazia, 1983

— Pronotum and scutellum without clear longitudinal stripes but with a lacy pattern of color with dark background and yellow to red spots; connexivum contrasted with alternating dark spots and lighter spots on each abdominal segment; antennomeres III, IV, V with large contrasting black spots ........................................................... 2

2. Antennomeres I and II all-black glossy, the 2/3 apical of antennomeres III black, and more of the the 4⁄5 apical of antennomeres IV and V black ........................................................ Phalaecus nigromaculatus Grazia, 1983

— Clear contrasted spots with a different color than the background dorsal surface; antennomeres I and II not entirely black glossy with only a distal black ring on second segment, and in P. carmini n. sp. also a distal dark ring on first segment. Antennomeres III-V with black areas smaller than above ........................................... 3

3. One large central impunctate orange spot on each corium, surrounded by numerous small orange coalescent spots (forming a network of impunctate light spots) occupying a large part of the surface whose darker background is punctuated; black apical spot on antennomeres IV shorter than half of its length ........................... .............................................................................................................. Phalaecus pustulatus ( De Geer, 1773)

— Small spots of the corium in lower number than above and generally separated from each other, not coalescent. Clear spots therefore are well individualized and more contrasted with respect to the background; black apical spot on antennomeres IV larger than or equal to half of its length ............................................................... 4

4. Antennomeres I black matt, black apical part on antennomeres III larger than half of its length; red carmine background color; legs yellow with rufous tarsus, knees and apex of tibiae ................ Phalaecus carmini n. sp. Antennomeres I brownish, black apical part on antennomeres III less than half of its length; brown background color; legs brownish almost concolorous .......................................................... Phalaecus ruckesi Grazia, 1983