148 
by Dr. Alan Stone. The information which 
he supplied has helped us place some of 
Walker’s inadequately described species and 
has been a great help to this study. We are 
very appreciative of this assistance and also 
of the wholehearted co-operation given us by 
Dr. Stone and Dr. R. H. Foote of the U. S. 
Department of Agriculture, Division of In- 
sect Detection and Identification. 
KEY TO THE GENERA AND SUBGENERA 
OF DACINI 
1. Mesonotum with transverse depression or 
furrow connecting lateral sutures. Basal 
section of vein Mif 2 deeply incurved into 
cell 1st M 2 (Fig. 30<3^). Fourth section of 
costa (cell R 2 ) not over 0.5 as long as third 
section (cell Sc), and vein Cui+lst A 
abbreviated. Sides and hind margins of 
each humerus sloping gradually into re- 
mainder of mesonotum so there is no 
distinct demarcation of the callus. Front 
femora with two to four spines beneath 
(fig. 30 ^) Monacrostichus Be 22 i 
Not as above (the front femora of a few 
species of Callantra may be spined) ... 2 
2. Abdominal terga conspicuously wider than 
long, segments one to four at least twice 
as wide as long 3 
Abdominal terga as long as wide 
Callantra? (Polistomimetes) Enderlein 
3. Antennae very elongate; second and third 
segments combined about equal to vertical 
length of head, and length of entire an- 
tenna greater than combined length of 
front and face. First antennal segment 
equal in length to second and at least 0.5 
as long as face (Fig. Ic). Abdomen strong- 
ly clavate and petiolate (Fig. 2c), with a 
prominent hump on each side of first seg- 
ment; first segment parallel sided or nar- 
rower at its apex than at its base. Abdomen 
strongly arched from a lateral view, and 
suture between segments three and four 
markedly concave. Ovipositor tubular in 
shape Callantra Walker 
PACIFIC SCIENCE, Vol. VIII, April, 1954 
Antennae comparatively short, first seg- 
ment usually not over 0.5 as long as sec- 
ond and less than 0.25 as long as face; 
entire antenna usually about equal to or 
shorter than front. Abdomen not strongly 
petiolate, first segment tapered from base 
to apex, usually about twice as wide at 
apex as at base; with no well-developed 
tubercles and not noticeably arched in side 
view. Suture between segments three and 
four straight or nearly so. Ovipositor usu- 
ally flattened dorsoventrally . 
Dacus Fabricius j. /. 3a 
3a. Scutellum with one pair of bristles . 3b 
Scutellum with two pairs of bristles . 
.3e 
3b. Prescutellar bristles absent 3c 
Prescutellars present . . . 3g 
3c. Anterior supraalar bristles present. 3d 
Anterior supraalars absent 
Dacus (Daculus) Speiser 
3d. Third abdominal ter gum of male with 
a row of cilia on each side ; 
Dacus (Neodacus) Perkins 
Third tergum without rows of cilia . . 
Dacus (Nesodacus) Perkins | 
3e. Prescutellar bristles present. 3f j 
Prescutellar bristles absent j 
...... .Dacus (Paradacus) Perkins , 
3f. Third abdominal tergum of male cili- : 
ated and a supernumerary lobe present i 
in male wing 
.Dacus (Zeugodacus) Hendel |; 
Third tergum without rows of cilia ! 
and no supernumerary lobe in male 
wing. Dacus (Paratridacus) Shiraki 
3g. Third abdominal tergum of male cili- 
ated Dacus (Strumeta) Walker 
Third tergum not ciliated 
Dacus (Gymnodacus) Munro 
