. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 594 ANNALS OF THE SOUTH AFRICAN MUSEUM extreme apex of second basal cell clear or with half or more than half of this cell clear to a variable extent and a large, pale, subopaque spot at base of third vein, or with most of the wings clear, only the base and costal cell and extreme base of marginal cell and anterior basal part of first basal cell dark brownish or blackish brown to a variable extent; such clear-winged $6* usually with spot- like infuscations at base of third vein, base of second vein,
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 594 ANNALS OF THE SOUTH AFRICAN MUSEUM extreme apex of second basal cell clear or with half or more than half of this cell clear to a variable extent and a large, pale, subopaque spot at base of third vein, or with most of the wings clear, only the base and costal cell and extreme base of marginal cell and anterior basal part of first basal cell dark brownish or blackish brown to a variable extent; such clear-winged $6* usually with spot- like infuscations at base of third vein, base of second vein, on middle cross vein, at base of discoidal cell and on basal cross vein of fourth posterior cell; costal cell rather broadish; middle cross vein in both sexes usually tending to be at. a b d Text-fig. 196. Ventral view of the aedeagal process of (a) <$ Thyridanthrax abruptoides n. sp.; (b) 6* Thyridanthrax viduatus (Lw.); (c) o* Thyridanthrax thyridus n. sp.; (d) S Thyridanthrax bolbocerus n. sp. about basal third to near middle of discoidal cell; first posterior cell broadish, narrowed apically; squamae brownish, pale- or white-fringed; halteres and other knobs brownish or velvety brownish. Head with a rather conspicuous foveate depression at about middle of frons even in ^; antennal joint 3 club- shaped, tapering rapidly from bulb-like base on inner side, its slender part longish, well demarcated, ending in a longish terminal joint which is much longer than joint 2. Hypopygium of $ with the aedeagal process (text-fig. 196, b) shorter, broader, more ovate than in either abruptus and lugens. Last sternite of o* with the dorso-apical angles slightly more prominent. In the South African and British Museums and in the Commonwealth Institute. Length of body: about 4-9 mm. Length of wing: about 4-8 J mm. Locality: South-western and Southern Gape, Little Karoo and Namaqualand. From the locality labels it appears that this species seems to be more frequently met with on mountainous
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
