Sitophilus Schoenherr, 1838
Diagnosis: Small, 4-5 mm in total body length; elongate-narrow in form, uniformly black, brown or black with red markings; antennal funicle of 6 articles, apex extended to posterior margin of eye; rostrum cylindrical, straight; eyes clearly visible in dorsal view; anterior margin of pronotum straight behind eye; tarsus of 5 articles, but article 4 small, located at very base of article 3, article 3 very slightly wider than 2 and bilobed ventrally, tibia with distinct subapical tooth at inner angle in addition to larger tooth at outer angle; front coxae widely separated; pygydium exposed beyond elytra; scutellum small, rhomboidal or subcircular, widest at middle.
Natural history: Species of Sitophilus are general stored products pests. The one confirmed species in Costa Rica infests seeds of tamarind, Tamarindus indica L. (Cotton 1920).
Diversity: Five species of Sitophilus are recorded from Central and South America. Four species, three cosmopolitan, were expected to be present in Costa Rica and Panama (as noted in Anderson 2002) but only the tamarind pod-borer, S. linearis (Herbst), has so far been confirmed by examination of specimens.
Sitophilus granarius (Linnaeus)
Distribution: Cosmopolitan (including Costa Rica); introduced from India.
Natural history: This species infests seeds of tamarind, Tamarindus indica L. (Cotton 1920).
The natural history has been summarized at http://preserve.nal.usda.gov:8300/jag/v20/v20i6/200439/a200439.htm