OF WASHINGTON, VOLUME XVI, 1914 65 



Recently I have had the priviledge of examining specimens of a 

 species of Ceratopogon (restricted sense) captured by Mr. I. P. 

 Kryger in Denmark while fastened to the wings of a geometrid 

 moth (Cidaria didymata L.). So tightly had the small flies in- 

 serted their beaks into the wing-veins of the moth that they 

 remained in position long after they had been introduced into the 

 killing-bottle and death had followed. 6 Of course the moth must 

 have been a recently emerged one, in which the blood was still 

 present in the wing- veins. The midges belong in the neighbor- 

 hood of Ceratopogon murinus Winnertz, but I have been unable to 

 place them satisfactorily and they are probably an undescribed 

 species. 



As to the Pachycerina captured by Mr. Mosier along with the 

 Forcipomyias on the caterpillar of the papaya sphinx, nothing 

 appears to be known of their habits. Probably they were attracted 

 by the blood exuding from the injured caterpillar, and were not 

 participants in the primary attack of the Forcipomyias. The 

 species was represented in the national collection by a single speci- 

 men taken by Mrs. Slosson at Biscayne Bay, Florida, and deter- 

 mined by D. W. Coquillett as Pachycerina flavida Wiedemann. 



Forcipomyia erucicida n. sp. 



Female: Occiput dull brown, clothed with coarse yellow hairs. Anten- 

 nae with the shaft yellowish, shading to brownish distally, the proximal 

 joints subglobose and subovate, the last five lengthened, subcylindrical. 

 Palpi black, the antepenultimate segment thickened, the penultimate 

 nearly as long, slender, subcylindrical, the last joint short. Thorax and 

 scutellum brownish black, a pale spot on the humerus, clothed with coarse, 

 shining yellow hair. Postnotum black. Abdomen black, clothed with 

 blackish hairs with yellow luster. Wings smoky, clothed with coarse 

 black hairs, a patch of yellow hairs at base of costa; subcostal cell thick- 

 ened and strongly pigmented, its distal end slightly beyond the middle of 

 the wing. Halteres with white knob. Legs yellowish, clothed with coarse, 

 irregular yellow hairs, a broad blackish ring at the ends of the middle and 

 hind femora, a narrower blackish ring close to base of the corresponding 

 tibiae; tarsi tinged with brown, slender, the first joint of the hind pair about 

 half the length of the second, last joint slightly thickened, subcylindrical. 

 Claws long and slender; empodium fleshy, ciliate. Length: Body about 

 2 mm., wing 2 mm. 



Male: Antennae plumose, luteous brown, the tori very large, the proxi- 

 mal joints of the shaft subglobose. Palpi considerably longer than in the 

 female. Abdomen slender, elongate, black, with broad pale segment al 

 rings on the proximal half; lateral ciliation of long and coarse brown hair 



6 En Myg, der angriber en Sommerfugl. Ent. Meddel., pp. 83-88, 1914. 



