June, 1912.] 
Life-Histories of Syrphidae IV. 
54i 
$ . Front shining black, yellow on the sides below; 
yellow lateral stripes of thorax extending only to the suture. 
Abdomen moderately broad, shining black with the extreme 
lateral margins continuously yellow and a moderately arcuate, 
entire, yellow band, reaching the yellow on the sides, on each of 
the segments from two to four inclusive. These bands cover about 
one-third the length of the segment. Fifth segment with a similar 
but slenderer yellow band interrupted in the middle. Sixth seg- 
ment yellow with some black on the disk. In other respects as 
in the male. 
EXPLANATION OF PLATE XXX. 
Figures 61-70 Allograpta obliqua (Say)- 
Fig. 61. Egg from the side x 20. 
Fig. 62. Dorsal view of egg x 20. 
Fig. 63. A small part of the surface of egg-shell showing sculpturing, 
highly magnified. 
Fig. 64. Adult $ about 7 times natural size. 
Fig. 65. Larva, 12-24 hours after hatching x 50; a , antenna; b, internal 
oesophageal framework; c, posterior respiratory organs. 
Fig. 66. Mature larva x 9; a, antenna; b, position of anterior spira- 
cles; c, posterior respiratory appen lages. 
Fig. 67. Antero-ventral view of the head of the larva, much enlarged; 
a, antenna; b, upper jaw;c, outer pair of mouth-hooks; d, the two pairs of 
lateral mouth booklets; e, chitinous oesophageal framework (internal); 
/, lower jaw. 
Fig. 68. End view of posterior respiratory organ x 200; a, one of the 
six elongate spiracles, b, the dorsal, circular plate; c, c, the interspiracular 
spines. 
Fig. 69. Dorsal view of puparium x 5 ; a, posterior respiratory 
appendage. 
Fig. 70. Outline of puparium from the side x 3.5; a, posterior 
respiratory appendage. 
Figures 71-78 Sphaerophoria cylindrica (Say). 
Fig. 71. Drawing of the adult male from the side x 7. 
Fig. 72. Terminal part of mature larva x 60, showing respiratory 
apparatus; a, slit-like spiracles; b, dorsal circular plate. 
Fig. 73. End-view of posterior respiratory appendage x 120; lettering 
as in Fig. 72. 
Fig. 74. Side view of anterior respiratory appendage, highly magnified. 
Fig. 75. The same from the end, showing teeth-like lobes. 
Fig. 76. The larva from the side x 5; a, posterior respiratory 
appendage. 
Fig. 77. Antero-ventral view of head segments, much enlarged; a, the 
antenna; b, the upper jaw; c, the two pairs of mouth-hooks close beside the 
jaws; d, the outer pair of mouth-hooks; e, chitinous oesophageal framework 
(internal) ; /, lower jaw. 
Fig. 78. Outline of puparium from the side x 7.5; the dotted lines 
indicate several variations in the shape of puparia. 
