22 PROCEEDINGS OF THE NATIONAL MUSEUM vol.70 



femur; abdomen yellowish, brownish apically, elongate, second seg- 

 ment nearly twice as long as wide, third and fourth segments more 

 globose; wings subhyaline; third vein with spur. Length 12 mm.; 

 wing 10 mm. 



Three males. 



Type locality. — Ega, Brazil (H. W. Bates). Also Tapayos, Brazil 

 (H. W. Bates). 



Type. — In British Museum. 



MICRODON BATESI, new species 



FeTYiale. — Very close to Microdon nigrispinosus, differs as follows: 

 Front entirely dark; antennae more elongate, the joints being 

 1 : 0.25 : 1 ; base of first joint yellowish ; face somewhat broader, more 

 protuberant below; thorax darkened, humeri j^ellowish; scutellum 

 with a purplish reflection and without spines ; hind femur with com- 

 paratively few black spines beneath; abdomen clavate, second seg- 

 ment nearly four times as long as broad, remaining part of abdomen 

 somewhat globose, dark brown, hind margin of third tergite yellow ; 

 wings subhyaline, infuscated along third vein. Length 13 mm.; 

 wing 10 mm. 



One female. 



Type locality. — Amazon, Brazil (H. W. Bates). 



Type. — In British Museum. 



This specimen bears the label "A very interesting new genus. 

 S. W. W."-[-S. W. Williston]. As it does not differ from the genus 

 Microdon in any other respect, and as a constricted abdomen is 

 possessed by other species of Microdon, the species had best remain 

 in this genus. 



NOTES AND DESCRIPTIONS OF SPECIES FROM CHILE 



The Diptera of Chile were given considerable attention from 1834 

 to 1888 by a number of the foremost dipterologists of that period. 

 Chief among them were Macquart, who described a large number of 

 new species in his four volumes of the Diptera Exotica ; Blanchard, 

 who contributed the section on Diptera for the Gay Historia de 

 Chile, Zoologia * ; R. A. Philippi, who published the Auf ziihlung der 

 Chilenischen Diptera^; and finally E. C. Reed, who published the 

 Catalogo de los Insectos Dipteres de Chile.® 



Several other dipterists, Wiedemann, Schiner, Van der Wulp, 

 Bigot, and Lynch-Arribalzaga, made minor or incidental contribu- 

 tions during this same period. 



<Vol. 7, 1852, pp. 327-468. 



» Verhandlungen der Zoologiscb-Botanischen Gesellschaft, Wien, vol. 15, 1865, pp. 

 595-782. 



«Anales de la Universidad de Chile, Santiago, vol. 73, 1888, pp. 271-316. 



