fiths (1981), will continue to be applied. Novasternum will be retained to refer to the pos- teroventral part of the hypandrium, and decasternum (sensu Bock & Wheeler, 1972) will be used for the "bridge" (pont of Tsacas) Connecting the sides of the epandrium internally.
Indices of taxonomic importance involve measures of structures abbreviated as fol- lows : Head : ch - maximum width of gêna (cf. j of Tsacas, width of gêna along line of eye's greatest diameter) ; fl (hf of Tsacas) - frontal length from ptilinal fissure to the vertex medially ; fw (lf of Tsacas) - frontal width, distance between eyes measured through ante- rior reclinate orbital setae ; H - head length, measured from distal edge of pedicel to the vertex ; hw (head width, lt of Tsacas) - distance between eye apices ; o - maximum diame- ter of eye ; or - orbital seta, orl proclinate, or2 anterior reclinate, or3 posterior reclinate. Thorax : akpst or pkpst - length of anterior or posterior katepisternal seta ; T - thoracic length measured from the anterior edge of the scutum to the scutellar apex. Abdomen : A - abdomen ; Tl-6, tergites. Wing : a - second costal section between the subcostal break and R2+3 ; 6 - third costal section between R2+3 and R4+5 ; c - M1 between dm-cu and wing margin ; d - M1 between r-m and dm-cu ; e - CuA1 between dm-cu and wing mar- gin ; f - dm-cu between M1 and CuA1 ; g - length of heavy setation in third costal sec- tion ; h - length of light setation in third costal section ; i - distance between distal ends of R4+5 and M1 ; L - wing length from axillary area to apex (cf. Grimaldi, 1987 : from humerai crossvein to apex) ; w - maximum wing width. Abbreviations for certain setae are self-evident in context and are not given hère. The length of curved features like the third costal section or the scutellar setae are measured in a straight line between the extre- meties. The body length is the sum of the head, thoracic and abdominal lengths (H+T+A) ; the abdomen in dry spécimens is almost invariably shrivelled, therefore the body lengths of live material will be slightly greater than the measurements given in the descriptions below.
Indices are derived using formulae given by Sturtevant (1942) and Bock (1976) : C-index = a/b, 4v-index = c/d, 4c-index = b/d, 5x-index = e/f, M-index = e/d, C3 fringe = g/(g+h) notg/b, sterno-index = akpst/pkpst. The relative positions of orbi- tal and inner vertical setae are indicated by the orbito-index = (distance between bases of proclinate and posterior reclinate orbital setae)/(distance between bases of inner verti- cal and posterior reclinate orbital setae). The ac-index = b/i. The ratios o:j, b/c and d/c hâve been used for many years in the descriptions of a number of African Drosophilidae ; for comparative purposes the former two are also given hère ; d/c is the reciprocal of the 4v-index (see McEvey et al., 1987 : 378).
Spécimens collected by the author, and some which are in temporary custody, hâve been numbered so as to facilitate their future récognition. The author consistently applies numbers to each spécimen collected and to some others examined ; an unpublished Spéci- men Register contains additional information about each. In addition to the number, a label reading "Registered Spécimen S F McEvey" is pinned with each spécimen, this is abbre- viated to "Reg." in the following descriptions. Most material from Madagascar was col- lected during the 1987 CNRS-Ecotrop expédition ; on labels the three collectors' names : Shane F. McEvey, Jean R. David and Sylvie Aulard, were abbreviated to : SFMcE.JRD.SA. Names of muséums are abbreviated : AM, Australian Muséum, Sydney; MP, Muséum National d'Histoire Naturelle, Paris. Only holotypes are described, when paratypes or females are known to vary such information is appended.
Scaptomyza (Scaptomyza) mateolata, sp. n.
"Drosophila (Lordiphosa) sp. nov. B" (David et al., 1989).
Holotype male in MP : "Curepipe [600 m], Mauritius, cultivated Cucurbitaceae flower, vii.1986, J.R. David", Reg. number 3354.
Distinguishing Features : Cerci fused ventromedially. Epandrium with long setae
Le texte affiché peut comporter un certain nombre d'erreurs. En effet, le mode texte de ce document a été généré de façon automatique par un programme de reconnaissance optique de caractères (OCR). Le taux de reconnaissance estimé pour ce document est de 99.98%.
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