APPENDIX I. 323 



sternum likewise ; scutellum and metathorax brown. Abdomen much 

 longer than the wings, brown, with whitish spots near its basis ; the first 

 joint is the longest ; its posterior margin, as well as that of the second 

 and third joints, yellowish ; the following joints have narrow and but litttle 

 perceptible whitish margins ; tip of the abdomen yellowish ; venter brown, 

 Tvith yellowish margins of the segments. Wings but slightly yellowish, 

 with a brown stigma ; veins like Meigen, Tab. VI, f. 2. Halteres yellow- 

 ish, with a brown knob ; feet brown. 



A. Fitch, Winter Insects of Eastern New York. 

 Tricliocera brumalis. 



Brownish-black ; wings and legs pallid at their bases ; poisers 

 blackish ; their pedicels whitish. 



Length of the male 0.18; of the female 0.25, the wings ex- 

 panding twice these measurements. 



Thorax with an obscure grayish reflection. Abdomen in the 

 male cylindrical, slightly narrower towards the tip ; in the female 

 elongated oval and pointed at the tip; each segment with a 

 strongly impressed transverse line in its middle, and the posterior 

 margin elevated into a slight ridge. Ovipositor fulvous, some- 

 times tinged with blackish. Wings hyaline, faintly tinged with 

 dusky ; inner margins ciliated with quite short hairs ; nervures 

 blackish. Legs very long, slender and fragile, blackish j femurs 

 brown, gradually paler towards their bases. 

 ■ Common in forests in the winter season, coming out in warm 

 days, flying in the sunshine and alighting upon the snow, its 

 wings reposing horizontally upon its back, when at rest. Even 

 when the temperature is below the freezing point and the cold so 

 severe as to confine every other insect within its coverts, it may 

 be met with abroad, upon the wing. It is a plain, unadorned 

 species, closely allied in its characters to the European T. hie- 

 maliSf but in a number of impaled specimens before me 1 can 

 detect no stripes or bands upon the thorax, whilst the very obvi- 

 ous character of the legs and wings, being pallid at their bases, 

 I do not find mentioned as pertaining to that species. 



Macquart, Dipteres Exotiques, Vol. I, 1, p. 66. 



Limnophila carbonaria Bosc. 



Thorace nigro ; alis fuscis, maculis fasciisque hyalinis. 



Tete testacee; parties posterieure du front brune. Museau 



