I.IO ]5ULLET1N 31, UNITED STATES NATIONAL MUSEUM. 



of the occiput; in the middle of the face, with a prouiiueut tubercle, 

 shallowly concave below the antennae. Third joint of the antennae not 

 very elongate, slender, broader at the base, not at all emargiuate, yellow; 

 arista densely plumose. Frontal triangle small, black, pilose in the 

 middle. Dorsum of thorax shining cobalt blue, with sparse black pile. 

 Scutellnm cobalt blue, but showing a translucent reddish cast; on its 

 border with six strong bristles. Abdomen brownish black, shining. 

 Legs reddish black. Wings hyaline. 



$. Front narrowed above, black, with light pile. Abdon^en with a 

 subopaque cross-band on the posterior part of the second and third 

 segments. 



Two specimens, Isthmus of Tehuantepec (National Museum, Professor 

 Eiley's collection). 



Volucella, n. sp. ? 



Habitat. — Mexico ! 



^. liesembles the preceding closely, but the antennae are darker, 

 there is a black fiicial stripe, and a similar one on the cheeks, and the 

 face is broadly pollinose on the sides. The second abdominal segment 

 has a broad, luteous stripe on the sides, and the third segment has a 

 narrow, broadly interrupted, cross-band of the same color. The wings 

 are broadly brown on the outer part, especiallj'^ in front. One specimen, 

 with those of the preceding species. 



ADDITIONAL NORTH AMERICAN SPECIES. 



Volucella abdominalis Wiedemann, Auss. Zw. Ins., ii. 196, 2 ; Macquart, Dipt. Exot., 



ii, 2, 25, 8. — Cuba. 

 Volucella amethystina Bigot, Ann. Soc. Ent. do France, 1875, 479. — Mexico. 

 Volucella aperta Walker, Trans. Ent. Soc, N. Ser., v, 292. — Mexico. 

 Volucella castanea Bigot, Ann. Soc. Ent. de France, 1875, 476. — Mexico. 

 Volucella chalybescens Wiedemann, Auss. Zw.,ii, 204. — Brazil; Jaennicke, Neue 



Exot. Di|)t., ]). 4. — Cuba. 

 Volucella fulvicornis Bigot, Ann. Soc. Ent. de France, 1883, 1884. — Panama. 

 Volucella lata Wiedemann, Auss. Zw. Ins., ii, 195. — Mexico. 

 Volucella mellea Jaennicke, Neue Exot. Dipt., 88. — Mexico. 

 Volucella nigrifacies Bigot, Ann. Soc. Ent. de France, 1875, 479. — Mexico. 

 Volucella picta Wiedemann, Anss. Zw. In8.,ii, 201 ; Bigot, in R. de la Sagra, etc., 



802.— Brazil (W.), Cuba (Big.). 

 Volucella pulchripes Bigot, Ann. Soc. Ent. de France, 1875, 480. ^Mexico. 

 Volucella postica Say, J. Acad. Phil, vi, 160, 2 ; Compl. Wr., ii, 360. — Mexico. 

 Volucella purpurifera Bigot, Ann.Soc.Eut.de France, 1875, 477. — Mexico. 

 Volucella tibialis ^lacquart, Dipt. Exot. ler Suppl., 123, 14. — Yucatan. 

 Volucella tricincta Bigot, Ann. Soc. Ent. France, 1875, 477. — Mexico. 

 Volucella tristis Big')t, Ann. Soc. Ent. de France, 1875, 482. — Jlexico. 

 Volucella (Temnocera) unilecta Walker, Trans. Ent. Soc. N. Ser. v,292. — Mexico. 

 Volucella varians Bigot, x\.nn. Soc. Ent. do Franco, 1875, 481. — Mexico. 

 Volucella variegata Bigot, Ann. Soc. Ent. do France, 1875, 478.— Mexico. 

 Volucella viridula Bigot, Ann. Soc. Ent. France, 1875,481. — Jlexico. 

 Volucella (Temnocera) viridula Walker, Trans. Ent. Soc. N. Ser. v, 292. — Mexico. 

 Volucella violacea Say, J. Acad. Phil., vi, 166, 1 ; Compl. Wr., ii, 360. — Mexico. 



