Xystosomus spangleri, Erwin, 1973

19. Xystosomus spangleri View in CoL , new species

FICURES 39 View FIGURES 37-39 , 41 View FIGURES 40, 41 , 70 View FIGURE 70

TYPE-LOCALITY.— Nine miles west of Los Algarrobos (near Rio San Pedro ), Panama. TYPE-SPECIMENS.—The holotype male and allotype are in USNM. Both were collected by P. J. Spangler in July 1967.

DESCRIPTION.— Form: As in X. elaphrinus , although flatter. Easily distinguished from the other two species of the group by the very shallowly im-

pressed rows 7 and 8 of elytral punctulae.

Color: Head and body piceous; dorsal surface shiny and with metallic green luster; appendages piceous.

Head: Very broad between eyes; frontal furrows shallowly impressed and separated from eyes by small rounded costae; eyes huge and hemispherical.

Pronotum ( Figure 39 View FIGURES 37-39 ): Quadrate (W/ L, 1.36; range 1.33-1.39; 2 specimens); otherwise as in X. elaphrinus .

Elytra: Each elytron with eight serial rows of fine punctulae, all except row 8 effaced before apex; rows 6 and 7 almost effaced throughout; otherwise as in X. elaphrinus .

Microsculpture: As in X. elaphrinus , except almost effaced from elytra and more engraved on head.

Secondary sexual characters: Male genitalia ( Figure 41 View FIGURES 40, 41 ) and female genitalia characteristic of the species group.

Size: Two specimens: length, 3.72-3.76 mm; width, 1.48-1.56 mm.

NATURAL HISTORY.— The two known specimens were collected in July in open country (either near

a small pond or in grassland beneath cow patties), not in association with trees ( P. J. Spangler and O. S. Flint, personal communications).

ETYMOLOGY.—I take pleasure in naming this species after my colleague, Paul J. Spangler, who collected the types.

LOCALITY RECORDS ( Figure 70 View FIGURE 70 ).— I have seen two specimens from the following locality:

CENTRAL AMERICA: PANAMA: Nine miles west of Los Algarrobos, near Rio San Pedro ( USNM).