Figure 1. 
Figure 2. 
Figure 3. 
Figure 4. 
Figure 5. 
Figure 6. 
Figure 7. 
Figure 8. 
JOURNAL OF ENTOMOLOGY AND ZOOLOGY 
bo 
© 
EXPLANATION OF FIGURES 
PLATE I. 
Sirex behrensii, 9. From a drawing by the author. 
Urocerus taxodii, 9. From a drawing by Miss Annie Sharp. 
PLATE II. 
Tremex columba, 9 . Photograph by the late Professor M. V. Slingerland. 
Xeris spectrum. Mouth parts. Photograph by Professor C. R. Crosby 
and the author. 
Urocerus. Mouth parts. Photograph by Professor C. R. Crosby and 
the author. 
PLATE III. 
From drawings by the author. 
The wings of Sirex juvencus cyaneus, showing the veins labelled accord- 
ing to the Comstock-Needham system. 
C—Costa. 
Se—Subcosta; Se: and Scz, respectively the first and second branches 
of subcosta. 
R—Radius; Ri, Re, Rs, Ri, and Rs respectively the first to fifth branches 
of radius. 
Rs—The radial sector (Re+s+i+s). 
M—Media; Mi, Mz, Ms, and Ms respectively the first to fourth branches 
of media. 
Cu—Cubitus; Cu: and Cuz respectively the first and second branches of 
cubitus. 
Ist A, 2d A, 3d A—Respectively the first, second, and third anal veins. 
r—The radial cross-vein. 
r-m—The radio-medial cross-vein. 
m—The medial cross-vein. 
m-cu—The medio-cubital cross-vein. 
Coalescence of veins or branches of veins is indicated by a + sign. 
The wings of Urocerus californicus, the cells numbered according to the 
Comstock-Needham system. 
C—tThe costal cell. 
Se, Se:—Subcostal cells. 
Se:—The second subcostal cell, or stigma. 
R, Ist Ri, 2nd Re, Ra, Ri, and Rs—Radial cells. 
M, M:, Ist Me, Ms, and M:i—Medial cells. 
Cu and Cu:—Cubital cells. 
Ist A, 2nd A, and 3rd A—Anal cells. 
Ap. —The appendiculate cell. 
The cells take their names from the vein or branch of a vein which 
in a primitive condition forms their anterior margin. 
Coalescence of cells is indicated by a + sign. 
The wings of Urocerus flavicornis, the veins labelled according to a com- 
bination of the systems of Konow, Cresson, etc. 
c—The costal vein. 
sc—The subcostal vein. 
em—The externo-medial vein. 
b—The basal vein. 
r—The marginal or radial vein. 
te’, re’, te’—The first, second, and third transverse cubital veins. 
cu—The cubital vein. 
re’, re’—-The first and second recurrent veins. 
d—The discoidal vein. 
tm—The transverso-medial vein. 
