Cryptognatha batesi Crotch

18. Cryptognatha batesi Crotch

Cryptognatha batesi Crotch 1874: 206; Korschefsky 1931: 219; Blackwelder 1945: 449; Gordon 1987: 26.

Description. Male holotype. Length 3.8 mm, width 3.4 mm. Dorsal surface shiny. Color black; head, pronotum pale yellow, pronotum with faint, brown basomedian macula (Fig. 99); venter dark brown except mouthparts, legs yellow; abdomen brown except mediobasal portion of basal ventrite dark brown. Head finely punctured, punctures separated by less than a diameter; pronotal punctures small, separated by a diameter or less; elytral punctures larger than on pronotum, separated by less than a diameter to twice a diameter, becoming gradually larger toward lateral margin; prosternal punctures large, indistinct; mesosternal punctures larger than on prosternum, contiguous, metasternal punctures large, separated by a diameter or less medially, absent in lateral 1/3; basal abdominal ventrite with coarse punctures separated by about a diameter medially, lateral 1/3 of ventrite lacking punctation, ventrites 2–4 finely punctured, punctures separated by about a diameter, ventrite 5 with dense, fine punctation. Head with frons slightly narrowed from base to clypeus, medially depressed, three times as wide as eye, apex emarginate medially, strong lateral carina present on frons near apex of eye (Fig. 100); eye canthus short, about 1/2 width of eye. Prosternum with lateral carina on each side long, curved, extended from apex of intercoxal process about 2/3 distance to apex of prosternum. Epipleuron moderately descending externally. Postcoxal line on basal abdominal ventrite evenly curved, extended about 3/4 distance to rear margin of ventrite. Genitalia long, penis guide 3/4 as long as paramere, slender, evenly narrowed from base to abruptly rounded apex; paramere long, slender, curved to rounded apex (Fig. 101); penis long, apex acute; penis capsule slender, elongate, inner arm slightly curved, apex rounded, outer arm slender, apex truncate. Penis not examined.

Female. Unknown.

Variation. Unknown.

Type locality. Ega (Brazil).

Type material. UMZC. Holotype, Gordon (1987).

Geographical distribution. Brazil.

Specimens examined. 1, holotype.

Remarks. This is an unusual species because of large size, striking contrast between black elytra and pale-yellow head, pronotum, emarginate clypeal apex, and the pronounced frontal carinae. Known only from the holotype.