Burbank.] 



150 [Nov. 19, 



tica, divided into seven lobules. 4c, full grown larva of Musca domestica, showing 

 the size of head relative to the prothoracic segment, with its spiracle ; a, end of 

 lobules of the spiracles ; mouth enlarged. 



Fig. 5. Two anal spiracles of Musca domestica. 5a, spiracle (much enlarged) 

 of a younger larva than the subject of tig. 5, with a narrower peritreme, and the 

 subcentral depression nearer the centre of the spiracle. 



Fig. 6. Spiracles of Calliphora vomitoria. 



Fig. 7. Spiracles of Sarcopliaga carnaria. 



Fig. 8, Ventral view of puparium of Musca domestica. 8a, prothoracic spira- 

 cles; 86, end of body; 8a, dorsal view from two individuals of same puparium. 



Fig. 9. Spiracles of puparium of Musca domestica. 



Fig. 10. Puparium (immature) of Stomoxys calcitrans, dorsal view. 10a, the 

 same, ventral view ; b, head-end enlarged; c, prothoracic spiracles. 10a", profile 

 view of end of pupariuni of the same. lOe, anal spiracles of the same. 



Fig. 11. Pupa of Musca domestica. 11a, leg. 116, wing, lie, optic ganglia. 

 be, optic lobes, divided into two well marked divisions ; oeg, upper oesophageal gan- 

 glion, resting above the base of the optic lobes ; e, eye in profile, and on the oppo- 

 site side the unorganized mass of fat cells, out of which the optic fibres and chani- 

 * bers of the eye are to be developed, lid, antenna. 



Fig. 12. Pupa of Stomoxys calcitrans, front view. 12a, dorsal view. 126, lateral 

 view. 12c, head much enlarged; m, mandibles ; mx, niaxilhe ; mp, maxillary palpi. 



Fig. 13. Thorax of semipupa of Stomoxys calcitrans, dorsal view, showing the 

 three thoracic segments, st, the prothoracic stigmata; w, wing; I, leg. 13a, ven- 

 tral view of the same ; 6, fore leg. 



Fig. 14. Pupa probably of one of the Dermestida?, ventral view; 6, dorsal view 

 of the end of the body ; c, ventral view ; d, antenna. 14a, dorsal view of pupa. 

 Found in Puparium of Musca domestica. 



Observations on the Surface Geology of North Caro- 

 lina, with Special Reference to some Phenomena of 

 the Drift of the Northern United States. 1 By L. S. 

 Burbank. 



Several years ago I had the opportunity to explore pretty thor- 

 oughly the midland region of North Carolina; which includes the 

 hilly or undulating country between the foot hills of the Blue Ridge 

 on the west,, and the lowlands lying to the eastward of Weldon, 

 Raleigh and Fayetteville. 



Some of the facts then noted appear to me to have an important 

 bearing upon questions connected with the subject of the Northern 

 Drift. I propose therofere, first, to present some of the facts ob- 

 served; second, to consider their relations to the phenomena of the 

 drift. 



My observations were made mostly in the counties of Wake, Gran- 

 ville, Franklin, Guilford and Chatham, N. C. The rock formations 



1 Tbe principal points embraced in this paper were presented in a verbal com- 

 munication to this Society Nov. 20, 1872. 



