DIPTEEA. 265 



thorax black. Scutellum, pleurae, and abdomen with a brownish tint ; hair of abdomen yellow. Wings 

 hyaline ; stigma round, deep brown ; marginal cell considerably dilated ; contact of second posterior 

 cell about equal to the length of the posterior cross-vein. Length 5 millim. 



Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith). 



One specimen. This species will be at once distinguished from C. humilis, Loew, 

 by the black hair of the head and thorax. 



7. Chrysopila basilaris. 



Leptis basilaris, Say, Journ. Acad. Phil. ii. p. 46 1 ; Compl. Wr. ii. p. 55 a ; Wiedem. Aussereur. 

 zweifl. Ins. i. p. 228 3 . 



Hab. United States, Pennsylvania l 2 3 . — Mexico, Vera Cruz (H. H. Smith). 



Two male specimens. The brief description applies to the Mexican insect, but this 

 does not make the identification certain. 



8. Chrysopila invalida, sp. n. 



S • Eyes broadly contiguous. Occiput, frontal triangle, and face bluish-white on a black background. 

 Palpi black ; proboscis yellow ; beard white. Antennae reddish-brown. Thorax black in ground-colour, 

 but thickly covered with a bluish-white dust; tomentum of mesonotum golden-yellow. Abdomen black; 

 first two segments light yellow, except for a black band or spot on the second ; tomentum golden-yellow. 

 Legs light yellow, the coxae excepted, tbe tibiae a little darker than the femora, the tarsi blackish. 

 Wings hyaline, the small stigma brown ; neuration as in C. aterrima. Length 7 millim. 



Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (II. H. Smith). 

 One specimen. 



9. Chrysopila puella, sp. n. 



,5 . Head and thorax nearly as in C. invalida, tbe eyes a little less closely approximated, the proboscis black, 

 and the mesonotum perhaps darker. Abdomen opaque black; first, third, fourth, fifth, and sixth 

 segments each with a broad, anterior, golden-tomentose band, the hair black. Wings infuscated distally, 

 otherwise as in C. invalida, the stigma perhaps more elongate. Length 5 millim. 



Hab. Mexico, Teapa in Tabasco (H. II Smith). 

 One specimen. 



10. Chrysopila nana, sp. n. 



J . Head as in G.plebeia, the bulbous portion of the face somewhat fuscous. Thorax blackish-brown, the pleune 

 in part obscurely yellowish or reddish ; mesonotum and scutellum covered with green and golden 

 tomentum. Abdomen yellow, the tip black ; second segment with a brownish, the third and following 

 segments each with a broad black anterior band ; hair black. Wings brown on the distal half, the 

 basal portion to within the discal cell subhyaline ; stigma a little darkc ; neuration nearly as in 

 C. phbeia. Legs as in O. plebeia. Length 7-8 millim. 



Bab. Mexico, Teapa in Tabasco (H. H. Smith). 



Three specimens. This species is nearly related to C. quadrata, Say. 

 biol. cestr.-amer.. Dipt., May 1901. 2 m 



