150 
PACIFIC SCIENCE, Vol. V, April, 1951 
Fig. 14A. Dacus {Strumeta) cacuminatus (Hering): a, head of male, front view; b, thorax, dorsal. 
a varietal sense under the names Dacus tryoni 
and Dacus ferrugineus. Tryon (1927) cited the 
name "0. solani Tryon mss. = C. dorsalis 
Hend.” (The "O” was no doubt a typo- 
graphical error.) The name solani was a manu- 
script name of Tryon’s but was a nomen nudum 
until Perkins and May (1949) described as 
new the "Australian dorsalis' under the name 
Strumeta solani. 
D. cacuminatus was confused with D. 
dorsalis Hendel in much of the more recent 
literature, and evidently Hering’s description 
(1941^^) was overlooked by the Australian 
workers. The species is related to D. dorsalis 
but is readily separated by a number of charac- 
teristics. The black mesonotal pattern is con- 
sistently different. It is represented by a rather 
narrow median line extending the full length 
of the thorax. This median line gradually 
widens behind the suture and expands broad- 
ly over the posterior portion of the mesono- 
tum (Fig. \Ah'). The area around, and pos- 
terior to, the prescutellar bristles is often 
reddish, and the basal portion of the black 
pattern is sometimes almost Y-shaped. A 
pair of thin brown to blackish vittae is 
usually present, extending cephalad from the 
lateral edges of the black pattern and ending 
before the suture or extending as two faint 
lines to the inner edges of the humeri. The 
black median line is apparently a constant 
character. It has been present on all of the 
several thousand specimens which I have 
examined. In the color variations of the true 
dorsalis the mesonotal pattern apparently 
never breaks down into a median vitta with 
an expanded base. In D. cacuminatus the yel- 
low vittae on the mesonotum end at the 
inner supra-alar bristle and at the suture. 
They do not extend beyond the bristles and 
into or along the suture as they do in D. 
dorsalis. The vittae are broadest on their an- 
