Dr. Kassai Tibor - Dr. Murai Éva szerk.: Parasitologia Hungarica 6. (Budapest, 1973)

latero-ventral ones most developed of all. Externo-lat

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al ray (thinest of lateral ones) decurrent parallel with ventral rays, and diverging from common trunk of lateral rays nearest its base (Pig. 4a). Dorsal rays well developed. Externo-dorsal rays originating at base of dorsal ray. End of this latter divided into six branches. Paratypes (2 males, 2 females). Femal

e s : body length 4.20-4.55 mm, maximum width 0.10 mm. Cephalic swelling 0.037 x 0.031 mm. Nerve ring 0.15 mm from anterior end. Distance of deirids 0.160.17 mm from anterior end, that of excretory pore 0.15-0.17 mm from cephalic end. Esophagus length 0.29 mm. Vulva opening at 0.70-1.20 mm from posterior end. Transversely striated lateral alae extending between regions beyond cephalic swelling and shortly beyond vulva, and there suddenly terminating (Pig. 4b). Tail length - including terminal spike - 0.055-0.070 mm. Tail end with five conical processes. One dorsal, two subventral, and two small lateral ones. Terminal spike present (Pig. 4c). Eggs 0.060-0.065 x 0.032-0.039 mm. Male s : body length 3-00-3.10 mm, maximum width 0.07 mm. Esophagus length 0.25 mm. Nerve ring 0.14 mm from anterior end. Deirids 0.15-0.17 mm from anterior end, excretory pore 0.17-0.19 mm. Spicules 0.16-0.18 mm. Gubernaculum 0.065-0.068 mm long. Number of branches at end of dorsal ray variable. Differential diagnosis: The dorsal and ventral cuticular surfaces of Molinostrongylus scotophili sp

. n. posses three longitudinal dotted lines each, from the anterior end to the region of the vulva in the females, and up to two-thirds body length in the males. The number of these lines is doubled, that is, six in the last third of the body length.No similar arrangement of the longitudinal cuticular lines is not known in any other member of the genus Molinostrongylus

. The nearest relatives of the new species are M. rhinolophi Yamaguti, 1941; M. pseud orna- tus Yeh, 1957 and M. dollfusi Thomas, 1959- In the males of M. scotophili sp

. n. the lateral alae do not reach the bursa copulatrix, while in the other three species the lateral alae ex-