Ill, — North American Conopid^ : Stylogaster, Dalmannia, 

 Oncomyia* By S. W. Williston, M.D, 



The following pages contain the result of studies made some time 

 ago, the publication of which has been deferred in the hopes of adding 

 the remaining species of the family belonging to the genera Zodion 

 and Myoiya. The greater diificulties that these genera present, how- 

 ever, will require for their elucidation a lai-ger amount of material 

 than is at present at my command. In a future paper I hope to 

 complete the family, so far as it is at present known in Noilh America. 

 There must be many new species. 



Stylogaster. 



Macquart, Tlist. Nat. des Dipt., ii, ,38, 1835. Dipt. Exot., ii, 3, 17, 1845. 

 Stylomyia Westwood, Proc. Zool. Soc. London, 1850, p. 270. 

 Ptyclioproctus Bigot, Revue et Mag. de Zool., No. 7, 1859, pi. xi, fig. 4. 



But four species of this genus are known, so far as I can learn, 

 from Africa, North and South America. The genus was first 

 described by Macquart and fignred from AViedemann's description of 

 BIyojxi stylata (Fab.) As might be expected, the figure is ludicrously 

 incorrect, and his description not much better. Hence it was that 

 Westwood described the genus more correctly as Stylomyia. The 

 genus may be characterized as follows : 



Antennae with a subterminal arista ; face carinate, narrow ; eyes 

 large, with an area of enlarged facets in front near the face ; proboscis 

 very long, twice bent ; abdomen cylindrical, ending in the female in 

 a long slender ovipositor ; anal cell of the wing small, obtuse, not 

 extending toward the border of the wing. Small slender species, in 

 large part yellow. 



Second joint of antenna? short; third elongate. neylecta, new. 



Second joint nearly as long as the third. hiannulata. 



Stylogaster neglecta, new species. 



5 ? . Eyes in life bright green, with an area of enlarged facets 

 directly in front near the facial border. The eyes are separated by a 



*0u the N. A. species of Gonops, see vol. iv, pp. 325-342. 



