PHALACROCERA. 305 



extends backwards, along the sides of the mesonotum ; the anterior 

 part of the metathorax is deeply rugoso-punctate, and some parts 

 of the pleura3 are also punctate. Halteres dingy brownish-tawny ; 

 coxa? brown, feet tawny, clothed with black hairs. Abdomen 

 brown. An indistinct cross-vein connects the latter part of the 

 first longitudinal vein with the costa ; discal cell elongated, 

 quadrangular ; stigma indistinct, colorless. 



Hah. Pennsylvania (Cresson) ; a single female specimen. 



This species is very like the European T. trisulcala in its 

 sculpture, but is manifestly different from it. The coloring of 

 the European species is more blackish than brownish ; the hind 

 part of the pleura?, the anterior part of the metathorax, and the 

 basis of the coxas are yellow, the antenna? and feet are darker, 

 the stigma is brownish, etc. 



Gen. XLIII. PHALACROCERA. 



First longitudinal vein incurved at the tip towards the second and end- 

 ing in it (P. tipulina), or ending in the costa and connected with the 

 second hy a cross-vein (P. replicata) ; a marginal, a submarginal, a discal, 

 and four posterior cells ; the anterior one of the three short veins con- 

 necting the discal cell with the margin is arcuated, in consequence of 

 which the first posterior cell is attenuated at the basis (and not square, 

 as usual); a distinct small cross-vein is present. Antennae 16-joiuted; 

 first joint elongated, joints of the flagellum elongated, almost cylindrical, 

 with short verticils. Eyes glabrous, separated by a rather broad interval 

 above and below. Tibise with distinct spurs at the tip. Empodia distinct. 

 Forceps of the male analogous to that of Cylindrotoma ; the aculeus is 

 three-branched, the branches connate at the basis, pointed at the tip ; 

 valves of the ovipositor broad. Body brownish, head and thorax grayish, 

 without any conspicuous punctures. 



Dr. Schiner established this genus, in 1863, for the European P. 

 replicata, which is easily distinguished from all the known Gylin- 

 drotomina by the course of the first longitudinal vein ending in 

 the costa and being connected with the second vein by a short 

 cross-vein. But it became much more difficult to define this 

 genus since the discovery of the North American P. tipulina, 

 which does not possess this character. In this species the first 

 vein is incurved towards the second and ends in it, just as it does 

 in all the other Cylindrotomina. The affinity of the two species 

 is otherwise evident, and in their sculpture, coloring, and general 

 appearance, they are sufficiently distinguished from the other 



20 November, 1868. 



