﻿56 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loo 



locality. The thorax is plainly differentiated down the midline of 

 both the dorsum and the venter, the left half with appendages agreeing 

 in all respects with normal females from the same locality, while the 

 right half with appendages is that of the normal male. The pattern 

 of maciilations on the thorax and legs of the two sexes is strongly 

 dimorphic and readily apparent in the figure. The sexual dimorphism 

 is marked also in thoracic punctation, details of wing venation, and 

 size of legs. The latter two differences are apparent in the figure. 



Label data : 3.9 miles west of Panama City beach. Bay County, Fla. ; 

 July 19, 1938 (Hubbell and Friauf ; No. 2823). 



campsomeris ephippium ephippium (say) 

 Plate 1, Figures 4-6 ; Plate 2 



Scolia epMppium Say, Boston Journ. Nat. Hist., vol. 1, p. 3G3, 1837. Male. 



The present specimen is of exceptional interest because it is one of 

 three complete lateral gynandromorphs known in the Scolioidea and 

 apparently the only one in which the terminal abdominal segments 

 and genitalia have been dissected and figured. The entire left half is 

 male and the right half female. This species exhibits scarcely any 

 sexual dimorphism in the color pattern, and the gynandromorph is 

 not spectacular in that respect as is the Myzine described above. How- 

 ever, there is strong dimorphism between the two sexes in the puncta- 

 tion and vestiture, mandibles, clypeus, antennae, legs, and the terminal 

 abdominal segments. The photograph of the dorsal view of the speci- 

 men shows the long, slender antenna of the male side as contrasted with 

 the very short, curled one on the female side, the dimorphism of the 

 legs, those of the female stout, very spiny, and adapted for digging, 

 those of the male slender and not adapted for fossorial use. The dif- 

 ferences in vestiture and punctation are not discernible in the photo- 

 graph, but the male side is comparatively more densely punctate and 

 hairy, with finer hairs than on the female side. The only morphologi- 

 cal peculiarity not found in normal males is that on the left side of the 

 top of the head there is an oblique callosity. This appears to be due to 

 the male side of the head being much smaller than the female so that 

 the whole head, viewed from above, has a twisted appearance. 



The seventh and eighth abdominal segments (morphologically the 

 eighth and ninth) of the gynandromorph also exhibit strikingly the 

 sexual dimorphism in this species. The seventh tergite (pi. 2, fig. 7) 

 in the male is exposed, relatively flat, opaque, strongly sclerotized, and 

 densely haired, while in the female it is retracted, strongly convex to 

 surround the sting and associated structures, transparent, weakly 

 sclerotized, and with a colorless, dorsal U-shaped area along the mid- 

 line. The seventh sternite (pi. 2, fig. 8) in the male is exposed, flat, 



