AMERICAN DIPTERA. 299 



21. P. eingulatus Loew. 



Dr. Hough in his paper (1899 Hough) page 81, is rather 

 confusing. In the table of species, section 1, he gives the 

 " abdomen shining black or bronze, with opake-black fascia 

 or spots on cephalic borders of the segments," in other words, 

 the segments have velvety black bases. This leads to the 

 species eingulatus and fuscus. In the description of the 

 former he says, "abdomen black, shining, with white polli- 

 nose sides, each segment with a slender basal, dark cinereous 

 pollinose fascia." This seems to suggest a subopake, brown- 

 ish and faintly gray pollinose condition. However, since he 

 again, in section 5 of the table, mentions that the segments 

 have " opake-black at their cephalic borders," it is very prob- 

 able that such is the case ; so I am considering this species 

 to have the abdomen shining black, with first segment api- 

 cally and the following ones laterally cinereous, the bases of 

 2-5 opake velvety black, and the tibiae nearly black with 

 basal third and extreme apices yellowish. 



The specimens before me I consider belonging here, 

 although the abdominal markings and coloration agree ex- 

 actly as described by Dr. Hough under fuscus Lw. How- 

 ever, on account of their dark tibiae, and of the fact that the 

 two species probably have similar abdominal characters, I 

 have placed such forms under this species. 



cf . Black. Front brown, face yellowish-white, and occiput white 

 pollinose. Antennae (Fig. 17), black, broadly acute, sometimes with 

 whitish spinose apices. Proboscis yellow ; palpi browuish. Mesonotum 

 and scutellum more or less shining, black or faintly brownish with 

 short brown pile. Pleurae and metanotum faintly cinereous ; humeri 

 black and halteres with yellow knobs. Abdomen subcylindrical, seg- 

 ments 2-4 subequal ; fifth longer, rather quadrate, with two faint 

 dorsal indentations ; clothed with scattered white pile, which is more 

 distinct laterally ; apices of segments 2-5 to greater or less extent, 

 polished and tinged with bronze lustre ; their bases opake, velvety 

 brownish-black, which is sometimes attenuating laterally, or, in variety 

 velutinus, the abdomen is entirely opake ; first segment more or less 

 cinereous, sometimes with two white spots, becoming more velvety 

 black basally ; also the apex of second faintly, and extreme ventral 

 margins, cinereous; hypopygium subopake, faintly cinereous, very 

 assymetrical, strongly compressed to right and cleft, in which there is 



TRANS. AM. ENT. SOC, XXXVI. (*38) JANUARY, 1911. 



