. Bulletin of the British Museum (Natural History) Entomology. THEREVINE STILETTO-FLIES OF THE ETHIOPIAN REGION 295 Abdomen. Brownish and without definite pattern, only with paler hind marginal seams. Abdominal pile pale. Total length 7-6-8-5 mm. Material examined. Holotype $ of macularis,? Sudan, labelled as 'Abyssinia, Dr. Riippell', type- locality stated by Wiedemann as 'Aegypten'. Mauritania: Nouakshott, 1 $, (L. Berland & A. Villiers) (IFAN). PSEUDOTHEREVA gen. n. Gender: feminine. Type-species: Thereva aethiopica Bezzi, 1906. Description. Head (Text-figs 330-332). Face m
. Bulletin of the British Museum (Natural History) Entomology. THEREVINE STILETTO-FLIES OF THE ETHIOPIAN REGION 295 Abdomen. Brownish and without definite pattern, only with paler hind marginal seams. Abdominal pile pale. Total length 7-6-8-5 mm. Material examined. Holotype $ of macularis,? Sudan, labelled as 'Abyssinia, Dr. Riippell', type- locality stated by Wiedemann as 'Aegypten'. Mauritania: Nouakshott, 1 $, (L. Berland & A. Villiers) (IFAN). PSEUDOTHEREVA gen. n. Gender: feminine. Type-species: Thereva aethiopica Bezzi, 1906. Description. Head (Text-figs 330-332). Face moderately broadened. Facial indices varying between 0-84 and 0-98, distance across face between lower corner of eyes is 84 to 98 per cent of height of head, only overlapping with Irwiniella in the female of /. natalensis (head index 087), while Thereva has facial indices varying between 0-94 and 1-27. Male eyes touching on frons. Female frons rather broad and predominantly shining blackish, at most paler tomentose oil lower part, the shining part not forming a distinct demarcated callus as in. Figs 330-332. Pseudothereva, female heads in frontal view. 330, Ps. unifasciata, holotype; 331, Ps. aethiopica; 332, Ps. parviseta. Scale: 0-5 Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
Size: 1723px × 1451px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbritishmuseumnaturalhistory, bookcentury1900, bookcoll
