Robustagramma luciense Cui and Marshall, 2005

Marshall, Stephen A. & Cui, Yongsheng, 2005, Systematics of Robustagramma, a new genus of New World Sphaeroceridae (Diptera), Zootaxa 1026 (1), pp. 1-122 : 78

Robustagramma luciense Cui and Marshall , new species

( Figs. 221–227 )

As described for Robustagramma biangulatum except as follows.

Body length 1.4–2.1 mm. Postocellar bristles cruciate, ca. 2/3 as long as postvertical bristles. Eye height ca. 2.5 times genal height. Preapical palpal bristles slightly longer than maximum palpal width. Posterodorsal katepisternal bristle 4/5 as long as distance between bristle base and wing base. Wing with costa between humeral and subcostal break slightly thinner than second costal sector in anterior view. Length of second costal sector ca. 0.45– 0.47X length of third. Mid tibia of male with short, stout ventral bristles on distal 2/3; mid femur of male with a distinct row of anteroventral bristles on basal 2/3 and more than 10 ventral proximal bristles in two rows.

Male terminalia: Sternite 5 without stout bristles or other characteristic bristles. Surstylus with a truncate apex in lateral view. Cercus similar in length to surstylus, with a slightly ampliate apex. Dorsal whip­like sclerite of distiphallus with a small nodule.

Female terminalia: Two sclerites of sternite 8 indistinct. Spermathecae with relatively short ducts; ducts of paired spermathecae ca. 1.3 times length of spermatheca.

Holotype (♂, DEBU) and paratypes (4 ♂, 10 ♀, DEBU): ST. LUCIA: ii.1978, S. A. Marshall.

Other paratypes: Same data as holotype but dung trap (3 ♂, DEBU) . ST. LUCIA: 20.ii.1978 (3 ♂, 2 ♀, DEBU) ; Cas­en­bas beach, ii.1978 (1 ♂, DEBU) ; Castries, 16– 26.ii.1978 (1 ♂, 1 ♀, DEBU) , S. A. Marshall.

Figures

FIGURES 221–227. Robustagramma luciense sp. nov.: 221, posterior view of male terminalia; 222, lateral view of male terminalia; 223, lateral view of male internal genitalia; 224, male sternite 5; 225, dorsal view of female terminalia; 226, ventral view of female terminalia; 227, spermathecae.