62 DIPTEKA. 



ATHERIX. 



Atherix, Meigen, in Illiger's Mag. ii. p. 271 (1803). 



1. Atherix longipes? 



Atherix longipes, Bellardi, Saggio &c. ii. p. 94, t. 2. f. 17 ( ? ) x . 



Hab. Mexico, Cordova (de Saussure x ) ; Costa Rica, Irazu 6000 to 7000 feet 

 (Rogers); Panama, Bugaba (Champion). 



I have a single male from Bugaba and a female from Irazu. They agree tolerably 

 well with Prof. Bellardi's description, but the thorax and the proximal half of the 

 abdomen are more reddish-yellow, the tip of the wings not hyaline ; the hind tibiae 

 and tarsi of the female are not infuscated. It may be a paler variety. The male 

 specimen has the thorax altogether black, with silvery pleurae ; the hind femora have 

 a brown band in the middle, the intermediate femora a similar band nearer the base. 

 Both sexes have a large hyaline spot at the distal end of the stigma, which is not 

 figured by Bellardi. Do our two specimens belong to the same species % Unfortunately 

 the type of A. longipes is not in Prof. Bellardi's collection. 



The other Leptidse previously recorded from Mexico (there are none from other parts 

 of Central America) are : — 



Chrysopila basalts, Walk. Trans. Ent. Soc. n. ser. v. p. 285. 



mexicana, Bellardi, Saggio &c. ii. p. 96. 



nigra, Bellardi, Saggio &c. App. p. 27. — Tuxpango, Mexico. 



trifasciata, Walk. Trans. Ent. Soc. n. ser. v. p. 284. 



Leptis bitceniata, Bellardi, Saggio &c. App. p. 26, f. 14. — Tuxpango, Mexico. 



(?) cinerea, Bellardi, Saggio &c. ii. p. 95. — Cordova, Mexico. 



politceniata, Bellardi, Saggio &c. App. p. 27. — Tuxpango, Mexico. 



Atherix latipennis, Bellardi, Saggio &c. ii. p. 93. — Oaxaca, Mexico. 



Fam. XYLOPHAGDXE. 



EHACHICERUS. 



Rachicerus (Haliday), Walker, List &c. v. p. 103 (1854). 



l. Rhachicerus bellus, sp. n., $ . 



Black ; hind tibiae white at the base ; wings black, with subhyaline spots in the middle of the cells ; halteres 



pale yellowish. 

 Length about 15 millim. 



Eab. Panama, Bugaba 800 to 1500 feet (Champion). 



Altogether black, shining ; front with a silvery reflection immediately above the 



