1965] 
Bush — Zonosemata 
313 
usually black, covered with long bristles; surstyli short with prensi- 
setae (or spurs) subterminal (Fig. 25) ; genital ring circular, without 
apodemes (Fig. 27); ejaculatory apodeme fan-shaped (Fig. 19). 
Vesica of aedeagus (Fig. 21) tubular, without convolutions or appen- 
dages. Female — ovipositor sheath approximately same length as 
tergite IV in dorsal view. Ovipositor (Fig. 17) short, margins 
slightly convex with minute trifurcate tip and two pairs of sub- 
terminal minute setae (Fig. 18) ; two elongate cylindrical spermathe- 
cae covered with irregularly shaped minute scale-like papillae (Fig. 
22) ; two elongate accessory glands. Ventral receptacle as in Fig. 20, 
without central spine as in Rhagoletis. Egg : micropyle end elongated 
into stalk (Fig. 26). 
KEY TO THE GENUS ZONOSEMATA 
The characters most readily used to distinguish the various species 
in this genus are found in the wing pattern and distribution of 
black maculations on the body. Other than size, little variation was 
noted in such structural characters as the male and female genitalia 
and the number, color, and position of major chaetae. 
1. A pair of black presutural spots on the dorsum (Fig. 36) and a 
black spot or stripe on the sternopleuron (Fig. 35). Host: 
Solatium eleagnifolium vittigera Coquillett 
(SW U.S.A., N Cent. Mex.) 
No distinct black spots before the transverse suture or on the 
sternopleuron 2 
2. Last three segments of the abdomen each with large, irregularly 
shaped dark brown to black spots (Figs. 15-cf, 16-$) ; dorsum 
with broad U-shaped maculation with unforked arms (Fig. 33). 
Host unknown minuta n. sp. 
(Jamaica) 
Pair of well developed spots on last one or two segments (i.e., 
Figs. 9-10) ; black U-shaped maculation on dorsum reduced or 
Explanation of Plate 23 
Figs. 9-16. Abdomen of Zonosemata spp., dorsal view: (9) $ electa, 
N. J., U. S. A.; (10) $ electa, N. J., U. S. A. ; (11) 2 vittigera, Texas, 
U. S. A.; (12) $ vittigera, Texas, U. S. A. ; (13) $ cocoyoc, Morelos, 
Mex.; (14) $ vidrapennis, type, Mexico, Mex.; (15) $ minuta, type, 
Jamaica, W. I.; (16) 2 minuta, paratype, Jamaica, W. I. 
Figs. 17-27. Zonosemata electa, N. J., U. S. A.: (17) ovipositor; (18) 
detail of ovipositor tip; (19) ejaculatory apodeme; (20) ventral receptacle; 
(21) aedeagus; (22) spermatheca ; (23) $ sternites of abdomen; (24) 2 
sternites of abdomen; (25) posterior view of $ genitalia; (26) egg; 
(27) lateral view of $ genitalia showing details of fultella and genital 
ring. 
