Hemiphileurus laeviceps Arrow 1947

Hemiphileurus laeviceps Arrow

Hemiphileurus laeviceps Arrow, 1947:222.

Ep[iphileurus] gysini Cartwright and Chalumeau, in Chalumeau, 1977b:152.

DESCRIPTION OF MALE.—Shining, dark reddish black. Clypeus with median, rather sharp, high, anterior tubercle from which four distinct carinae extend backward, enclosing three smooth, shining concave areas, the two inner carinae extending back to the inner bases of two strong, blunt, slightly recurved horns, the two outside carinae curving gently upward to sharp angles forming the anterior limit of wide lateral notches anterior to the semicircular genae; the outside carinae outline a narrow concave clypeal margin just above the mandibles; base of head deeply, smoothly excavated behind the horns, a few fine to moderate punctations back and around base of the horns; the horns are twice as far apart as the distance from horn to genal notch.

Pronotum 9.0 mm wide, 6.0 mm long, convex, anterior angles acute, posterior angles broadly rounded, finely margined all around, surface with scattered fine to moderate punctations, a little closer and finer anteriorly and laterally, a trifle coarser and closer in median, shallow, longitudinal depressed line over basal two-thirds.

Elytra 12 mm long, 10 mm wide. Shoulders smooth, impunctate; intervals noticeably convex, striae deep, coarsely annularly punctate, striae 3, 4, and 5 ending apically in a smooth callosity. Scutellum smooth.

Prosternal postcoxal process high, apically flattened, smooth, triangular, slightly convex in middle; the posterior angle of the triangle with a separating suture. Mesosternum smooth and shiny at middle, closely punctate anteriorly with short decumbent hair. Metasternum smooth, shining at middle with fine longitudinal midline, coarse annular punctations outward toward sides and along postcoxal plates which are similarly coarsely punctate. Abdominal sternites generally smooth except for an anterior borderline of close moderate annular punctations and median line of five or six hairs bearing punctations near the sides; except the terminal sternite which has rows of very close fine punctations along the anterior margin, the posterior margin fringed with long hair and broadly emarginate. Pygidium very convex, maginal carina fine laterally, very much wider apically; surface with deep moderate punctations separated by one to four or five times their diameters, much finer and closer at base. Apex of hind tibia with a very strong terminal spine opposite the spurs and seven strong but short stubby setae along the edge, six in a group close together, another close to the spurs (group of six on one leg, seven on the other!) Hind tarsus subequal in length to length of tibia. Aedeagus very distinct (see Figure 16).

HOLOTYPE.—Male, length 20 mm, width 10 mm.

ALLOTYPE.—Female, length 19 mm, width 9 mm.

Head similar to that of male except that the two posterior horns are reduced to low rounded tubercles, the three smooth areas behind the apical clypeal tubercle are noticeably finely punctate and the basal punctations are closer and finer. The pronotal punctations are more widely scattered. The pygidium is more densely punctate especially along base and sides, the marginal head gradually and only slightly wider at apex. Terminal abdominal sternite finely closely punctate over anterior half, gradually less closely over apical half. The sternite is broadly rounded apically in contrast to that of the male which is broadly emarginate.

LOCATION OF TYPES.—The holotype of Hemiphileurus laeviceps Arrow is in the British Museum (Natural History). The holotype, allotype, and three paratypes of E. gysini were collected in Dominica, June–July, H. W. Foote, Yale Expedition 1913; in the National Museum of Natural History, Smithsonian Institution, USNM 74072. Other paratypes: (1) Warner Road, 1 Jul 1964, in rotten log, Thelma M. Clarke (USNM); (1) Magua, 20 Sep 1964, T. J. Spilman (USNM); (1) Rivière Lacroix, 3 Aug 1973, in decaying Mango tree, Jürg Gysin (FC); (1) Rivière Lacroix, 3 Aug 1973, Yves Cambefort (FC); (3) Morne Macaque, 11 Feb 1976, F. Chalumeau (FC); (4) Pont Cassé, 13 Feb 1976, F. Chalumeau (FC). Paratypes in collections of the National Museum of Natural History, Smithsonian Institution, and F. Chalumeau.