N0 - S622 STRATIOMYIDAE — JAMES 5 



frontal callus continued ventrad in the middle across the antennal 

 bases and expanding onto an indefinitely outlined facial area that 

 may, in turn, expand into a transverse band across the middle of the 

 face. Some yellow pile at lower posterior angle of eye, head otherwise 

 with rather dense, erect black pile. Vertex in holotype 0.27 head width, 

 widening to 0.36 head width at callus, then narrowing to 0.30 head 

 width across oral margin. Eyes with dense black pile that is somewhat 

 longer than second antennal segment. Antenna as in P. albitalus 

 (cf. Williston's figure reproduced in Curran, 1934, p. 136), black 

 haired. Proboscis pale yellow with some black but mostly with con- 

 colorous hairs. 



Thorax black, with blue-green reflections, particularly under 

 certain lights, these reflections more obvious than on the head. 

 Thoracic pile chiefly golden, that of mesonotum mostly tomentum- 

 like but semi-erect to erect laterally, that of pleura mostly semi- 

 erect; some erect black mesonotal pile but, except when viewed 

 posteriorly, this is much less conspicuous than the golden pile; pleura 

 also with patches of short, erect black pile or with black hairs inter- 

 mixed with the golden, but this again less conspicuous than the 

 golden pile. Squamae mostly brown, their fringes coppery. Halteres 

 greenish yellow. Coxae, trochanters and femora except apices black; 

 front and middle tibiae more or less brownish on median half, hind 

 tibia blackish on apical half; last tarsomere of front and middle 

 tarsi yellowish brown; hind tarsus from apical part of basi tarsus 

 blackish; tibiae and tarsi otherwise whitish. Wing distinctly infu- 

 mated beyond base of discal cell, subhyaline at base; extreme wing 

 base and second basal and anal cells except extreme apex devoid of 

 microtrichia; vein r-m strongly arcuate; R 2 +3 arising beyond r-m by 

 more than length of r-m. 



Abdomen black; a large translucent area usually taking up most 

 of the first segment and a part, sometimes most, of the second, re- 

 sulting from a pale, translucent integument both dorsally and ven- 

 trally; sometimes, but not usually, the suggestion of a division of this 

 area along a median line. Second to fourth abdominal segments 

 almost parallel sided. Abdomen with appressed black pile over most 

 of the dorsum and on venter except for first sternum, where the 

 appressed hairs are yellow. Second to fourth terga each with an 

 apical narrowly interrupted golden tomentose band; first three terga 

 with golden erect to semi-erect lateral pile. Genitalia black; ninth 

 sternum prolonged laterally on each side into processes that curve 

 medially, the dististyli arising inconspicuously medially of these 

 processes and ending before their apices (fig. 2); aedeagus trifid, 

 the guards cylindrical and bowed gently outward at apex, the intro- 

 mittent organ also cylindrical. Apicoventral part of ninth sternum 



