S. Mahunka szerk.: Folia Entomologica Hungarica 44/2. (Budapest, 1983)
Diastolinus puertoricensis Marcuzzi, 1977 (Fig. 18) MARCUZZI (1977): Studies on the fauna of Curacao and other Caribbean Islands, No. 170: 20. Examined specimen: Puerto Rico. Highly sclerotized, shining, dark brown, very different from all other antillean species. Apicale only scarcely shorter than basale (A:B = 0,88 ca.). Basale in lateral view scarcely convex, apicale broadened at the base, then gradually narrowed, abruptly bent upwards before the apex, the latter not pointed as in most species. In dorsal view basale much wider than apicale, with the sides rather rectilinear. Apical long, in the hind half gradually narrowed, in the apical half with rather parallel sides; the latter a little sinuate before the apex, which is rounded as in no other species. Parameres well developed in the apical portion, aedeagus not visible (dorsal view). It should be difficult today to attribute the peculiar habitus of the aedeagus to the long age Diastolinus puertoricensis must have, compared with the rest of species, present generally on two or more islands and often generated after the isolation of Puerto Rico from other Caribbean islands. Diastolinus barbudensis barbudensis Marcuzzi, 1962 (Fig. 19) MARCUZZI (1962): Studies on the fauna of Curacao and other Caribbean Islands, No. 57: 29, pl. 1, fig. 8. Examined specimen: Nevis, Mosquito Bay. Different from all other species of Diastolinus, both of the Antillean islands and the Souther Caribbean ones. Very broad, basale much longer and wider than apicale (A:B = 0,47), wider almost twice as the apicale, in lateral view extremely flattened, almost horizontal, slender, only the apicale convex in the basal half and then bent upwards, with a rather pointed apex. Apicale tubular apparently as in the South Caribbean species, with a division only in the ventral side. Aedeagus apparently visible inside the apicale. The small size of the unique examined specimen, in dry condition (a paratypus), does not allow a better vision of details. Basing on both the original description (MARCUZZI, 1962, p. 29, Pl.I 8) and on phallus external morphology, one would be induced to think of this species, endemic of a small group of islands distant one from another only 50 km, as of a different genus or subgenus, but at the present state of knowledge it should be risky to describe a new taxon. Diastolinus curtus Mulsant & Rey, 1859 (Fig. 20) MULSANT & REY (1859) Opusc. ent., 9: 93. Examined specimen: Paraguaná, Pueblo Nuevo. Quite different from all above described Antillean species and very similar to the other SouthCaribbean elements. Basale much longer and wider than apicale (A:B = 0,5 ca.), maximum width of basale more than double that of apicale at its middle. Basale ovoidal, narrowed both at base and apex; apicale funnel like (a little as in D. barbudensis , but much more clearly and regularly) divided only a little on ventral side, towards the apex furnished with a highly characteristic microsculpture represented by short, narrow, longitudinal ridges, common to the other South-Caribbean species (see later). In lateral view basale only slightly convex dorsally, apicale only slightly bent towards the apex, which is pointed. Diastolinus fairmairei Marcuzzi, 1949 (Fig. 21) MARCUZZI (1949): Méms Soc. Cienc. nat. 'La Salle', 9: 336, 338, 344. Examined specimen: Margarita, El Valle. Very similar to D. curtus (A:B = 0, 46) but not so wide (maximum width of basale only 1 1/2 the width of apicale). The latter is also funnel-like, but not so narrow at the base as in D.curtus . Also in this species a very characteristic sculpture is visible before the margin of the apicale (limited apparently to ventral side). In lateral view much wider than D. curtus , the basale distinctly wider than the apicale, more convex dorsally, the apicale regularly and gradually narrowed towards the apex, which is well pointed.
