S. Mahunka szerk.: Folia Entomologica Hungarica 44/2. (Budapest, 1983)

hind 2/3); apicale gradually narrowed from the base, in some instances (one specimen from Margarita) sinuate before the apex, parameres constantly divided, in some Instances up to the base (specimen from St.Lucia), with the apex variable from rounded to slightly pointed. Aedeagus never visible in dorsal view. In lateral view the basale is rather thick (particularly in one specimen from Margarita Id., Salamanca) gradually narrowed both towards apex and base, little convex, the apicale very variable, from rather thin, gradually narrowed and slightly convex dorsally (specimen from St. Lucia) to very short, plump, convex dorsally and then bent ventrally. The apex is constantly somewhat rounded. The great variability of both phallus and external, skeletal parts demonstrates that this species has not undergone a subspecific differentiation; sufficit to see the differences we find in two specimens from Margarita (Salamanca and El Valle, distant only a few km one from another). At the present state of knowledge one should say that O.gemellatus is the most variable as far as the phallus is concerned, unparalleled by external morphology. Opatrinus gridellii Marcuzzi, 1949 (Fig. 28) MARCUZZI (1949): Méms Soc. Cienc.nat. 'La Salle', 9: 338, 342. Examined specimen: "Venezuela", coll. BRÊME. This closely related, partially sympatric species is scarcely distinguishable from O.gemellatus by means of the phallus, which shows a regular ovoidal basale, narrowed very regularly from base to apex, an apicale also gradually narrowed from base to tip. In this species the parameres are completely divided, rather rounded at the tip. In lateral view also very similar to O.gemella tus , regularly convex dorsally, of the same thickness from base to apex, and very gently bent downwards. The point is distinctly rounded; also the length of phallus compared with that of the body is the same as in O. gemellatus (see Comments). Opatrinus lüderwaldti Gebien, 1928 (Fig. 29) GEBIEN (1928): Stettin, ent. Ztg, 89: 112. Examined specimen: Brasil, Victoria (a not sufficiently localized place). Different from the above species because of the broad ovoidal basale, widest at the middle, the apicale whose base embraces the apical part of basale, entirely divided up to the base, somewaht liguliform, with the apex gently and regularly rounded. In lateral view the basale is very flattened, very long (A:B = 0,33), the apicale at the base dilated, then gradually narrowed up to the point, which is a little obtuse. Opatrinus laticollis Latreille, 1833 (Fig. 30) LATREILLE (1833): in Humboldt & Bonplaird Voy.reg.equin.nouv. cont., 2: 66. Examined specimen: "Colombia", leg. LEBAS. Very small (1,48 mm) and narrow, basale with almost straight, parallel, sides, rounded at the base, truncate at the apex; apicale subtriangular, with the sides of parameres sinuate, and regularly rounded at the tip; very short and narrow separation between the two parameres in lateral view the basale is perfectly flatten, gently curved at the base, very long (A:B = 0, 29). Apicale gradually narrowed towards the apex, the latter gently bent ventrally and rounded. Though surely allied to O. gemellatus because of external features and geographical distribution, it is easily distinguished from it because of the triangular form of apicale and the ratio A:B. Opatrinus puertoricensis Marcuzzi, 1977 (Fig. 31) MARCUZZI (1977): Studies on the fauna of Curacao and other Caribbean Islands, No.

170: 23, pl. 1, fig. a. Examined specimen: Jamaica, Long Mts near Mona Reservoir. Rather wide, basale with almost parallel sides, rounded at the base, long compared with apicale (A:B = 0, 34), apicale a little widened at the base, then gradually narrowed towards the apex, which is rather rounded. Division between parameres reaching the basal fourth. In lateral view it is highly characteristic, because of the presence of some setae on the apex of the apicale, not visible in dorsal view. Basale flattened though thick, rounded at the base, truncate at the apex. Apicale regularly narrowed from base to tip. The latter distinctly rounded. It can be immediately