Xo. 64] DIPTERA OF COXXECTICUT : TAXONOMY 353 



P. (Trici/jthona) pa\udico\a. {Ahx.) (Fig. 41, F). 

 lUlC). Trk'i/phona imludicola Alexander; Proc. Acad. Nat. Sci. Phil- 

 adelphia, 1916:538-540. 



Figs.— Alexander, Ihid., 1916, pi. 28, fig. 53 (wing). Alexander, Cfls. N .Y., 1, 

 pi. 42, fig. 184 (wing) ; 1919. 



General coloration brownish gray, the praescutum with four 

 brown stripes ; pleura gray. Head brownish gray. Knobs of halteres 

 infuscated. Femora obscure yellow, tips broadly brownish black. 

 Wings sometimes nearly unimaculate ; cell Mz sessile. Abdomen dark 

 brown, including hypopygium. Male hypopygium (Fig. 41, F) with 

 apex of basistyle set with microscopic black spines; dististyle bearing 

 two or three small spines or spinous plates; interbase with abundant 

 setae on distal half. $. L. 7-8 mm.; w. 8-9 mm. 9. L. 10.5-11 mm.; 

 w. 10.5-11 mm. 



(May-early June). Ont., N. B., Me., Vt., Mass., N. Y., westw. to Mich. 



The four species, katahdin., iixacateel^ palu^lcola and pumiht, all 

 have this peculiar type of hypopygium and are unquestionably closely 

 allied, being best separated by the characters given in the key. 



P. {Tricyphona) pumila sp, nov. 



Rostrum brownish gray; palpi dark brown. Antennae 14-seg- 

 mented, dark brown throughout; flagellar segments oval, the outer 

 ones more narrowed ; terminal segment longer than the penultimate. 

 Head yellowish gray, the center of vertex extensively infuscated; 

 a weak low carina on vertex, possibly abnormal. 



Pronotum brow^nish gray, the central portion a little darker. 

 Mesonotal praescutum gray with four brown stripes, the median line 

 more brownish gray; posterior sclerites of mesonotum clearer gray, 

 the center of each scutal lobe with a brown triangular area. Pleura 

 gray, the dorso-pleural region more yellowish. Halteres obscure yel- 

 low^, the knobs infuscated. Legs with coxae brownish gray; tro- 

 chanters brownish yellow; femora brownish black, the basal portions 

 brighter; remainder of legs black. Wings narrow, whitish subhyaline, 

 with a very restricted brown pattern that is chiefly costal, including 

 small spots at ends of veins Sc, B1 + 2 and as narrow vague seams 

 along the cord; veins pale brown. Venation: tending to be degen- 

 erate ; petiole of cell R^ elongate, exceeding cell 1st M?. 



Abdomen brownish gray, including the hypopygium. Male 

 hypopygium much as in kataMin; dististyle broadly flattened and 

 provided with two or three spines; setae of interbasal process very 

 dense but of moderate length only; aedeagus capitate. $. L. about 

 5.5 mm. ; w, 5x1 mm. 



Holotype, <5 . near Woodstock, New Brunswick, June 15, 1929 

 (C. P. A.) ; in author's collection. 



The species belongs to the paludicola group, being most closely 

 allied to the typical member, paludicola. It is the smallest and most 

 degenerate species of the genus so far discovered in Eastern North 

 America. :More recent observations made in ^Michigan by Professor 

 Rogers indicate the probability that pumila is scarcely distinct from 

 palndicola. 



