No. 64] DIPTERA OF CONNECTICUT : TAXONOMY 211 



3. Halteres pale yellow, without conspicuouslv darkened knobs (slightly suf- 



fused at bases of knobs in sayi and zvalleyi) ; male hypopygium with 

 gonapophyses more or less expanded outwardly into pale blades, usually 



with pale spinous points 4 



Knobs of halteres dark brown ; male hypopygium with gonapophyses either 

 appearing as divergent cushions set with black spinous points, or else 

 as flattened blades that narrow at apex into a single acute spine 6 



4. Aedeagus at apex split into two acute black points ; each gonapophysis at 



apex extended laterad into a long point. (Fig. 26, G) similis 



Aedeagus simple; gonapophysis not prolonged into a slender apical point... 5 



5. Gonapophyses not spinose, appearing as flattened blades that are slightly 



expanded at outer ends, the surface with abundant setulae. (Fig. 26, F) sayi 

 Gonapophyses expanded at tips, the apex set with irregular denticles. 

 (Fig. 26, K) walleyi 



6. Gonapophyses appearing as flattened plates, without spines 7 



Gonapophyses appearing as divergent cushions, set with strong black spines 



and spinous setae ^ 



7. Thoracic pleura yellow, unmarked ; stigma pale brown ; no dark seam 



along vein Cu; hypopygium with lateral arms of tergite not expanded; 



gonapophyses not blackened at tips. (Fig. 26, B) dorsalis 



Thoracic pleura variegated with dark brown ; stigma dark brown ; a dark 

 seam along vein Cu; hypopygium with lateral arms of tergite angularly 

 expanded ; gonapophvses graduallv narrowed into long black spines. 

 (Fig. 26, J) '. '. venosa 



8. Median region of 9th tergite of male hypopygium more or less produced. 9 

 Median region of 9th tergite of male hvpopvgium weakly emarginate. 



(Fig. 26. C) johnsonella 



9. Surface of thoracic notum usually subnitidous ; male hypopygium with base 



of outer dististylc abruptly dilated. (Fig. 26, E) polita 



Surface of thoracic notum opaque male hypopygium with the outer dis- 

 tistylc not expanded at base 10 



10. Median region of tergite of male hypopygium produced into a small, dark 

 plate that is tridentate at apex ; inner dististvle very broad, bidentate 



and spinous at tip. (Fig. 26, I) ■■ .tridenticulata 



Median region of tergite produced into a small point on either side of 

 median line; inner dististvle narrow, at anex narrowed to an obtuse 

 blackened point. (Fig. 26,"D) obscura 



Arrangement of species, based on male hypopygial characters : 



1. Gonapophyses (Fig. 26, C, D. E, H. T) densely set with blackened spinous 



setae, johnsonella, obscura, polita, subalbipes, tridenticulata. 



2. Gonapophyses (Fig. 26, A, B, F, G, J, K) appearing as flattened plates, 



with setae, but no blackened spines or spinous setae, the apex snuioth 



or else terminating in one or more glabrous pale spines, carolus, dorsalis, 



sayi, similis, venosa, walleyi. 



Dolichopeza {Oropeza) carolus nom. nov, (Fig. 2G, A). 

 1909. Oropeza alhipes Johnson; Proc. Boston Soc. Nat. Hist., 34:121 

 (preoccupied). 



Fig. — Johnson, Ibid., pi. IS, fig. 12 (hyp.). 



Praescutiim brown, with three darker stripes; pleura yellow, 

 variegated with dark brown. Knobs of halteres darkened. Male 

 hypopygium (Fig. 26, A). $ . Ht. 10 mm.; w. 12 mm. ?. L. 12-13 

 mm.; w. 11- 12 mm. 



(June- Aug.) Que., N. B., Me., N. H., Vt., Mass., N. Y., N. J., Pa., westw. to 

 Ind. and Mich., southw. to Va., N. C, S. C. and Tenn. 



