Chonocephalus furcatus Borgmeier 1967

Chonocephalus furcatus Borgmeier

Chonocephalus furcatus Borgmeier, 1967a, p. 206, figs. 27, 30 [=figs. 147 and 148 in the present paper].

Original description:

MALE.—Length about 1.2 mm. Head width 0.30 mm. Frons dark brown. External bristle on upper border of antennal grooves 0.10 mm long. Third antennal joint pointed, about as broad as long. Palpi of normal shape and size, apical hair slightly differentiated.

Thorax castaneous; humeri, pteropleura and stemopleura paler. Scutellum with 4 bristles, the anterior a little shorter.

Abdomen opaque. Tergites 2–5 subequal in length, 5th elongated, all with a fine yellowish seam behind. Hypopygium [Figure 148] high and short, brown, slightly shining. Epandrium at left side of anal opening with a slender process (p) and farther below with a long single bristle; at both sides of the anal opening there is a series of hairs which are curved apically. Hypandrium at left with a long slender fork [Figure 148] and at right with a lobulate process provided apically with two fingerlike structures close together [Figure 147] and which became visible only after removing the inner copulatory organs.

Legs slender, yellowish brown, mid tibia whitish yellow on distal half. Fore tibia 0.20 mm, fore metatarsus 0.10 mm. Mid tibia 0.26 mm, mid metatarsus 0.13 mm. Hind tibia 0.36 mm; hind tarsus dilated as usual; hind metatarsus 0.14 mm. End-spurs of mid and hind tibia very short.

Wing brownish, clouded more or less as in punctifascia Borgmeier (1935[b]) but with less contrast [see remarks p. 48, under C. punctifascia]. Length 1.20 mm, width 0.53 mm. Costa about 0.6 of wing length, exceeding the point of contact of 3rd vein with the costa; apical swelling of 3rd vein slightly diverging from anterior border of wing. Fourth vein slightly concave; 5th straight except at apex which is slightly deflected; 6th slightly sinuous. Halteres dark brown.

Holotype male, mounted on minuten pin (USNM [70440]), from Dominica, South Chiltern Est., 20 Feb. 1965 (W. W. Wirth). One paratype, dissected, on slide (CTB), Dominica, Trafalgar Falls, 6 March 1965 (W. W. Wirth).