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Petralia & Vinson — Anatomy of Ant Larvae 
383 
rows of posteriorly pointing spinules are on the anteroventral region 
of abdominal segment 2, while a very few (less than 10) anteriorly 
pointing spinules are on the posteroventral region of this segment 
(Fig. 19). Numerous short rows of posteriorly pointing anteroventral 
spinules and anteriorly pointing posteroventral spinules occur on 
each of abdominal segments 3-5 (Figs. 20, 21). Abdominal segment 6 
bears only a few spinules pointing in each direction, while segment 7 
bears very few spinules. Adult queen ants were observed to place solid 
food on the posteroventral region of larvae, which readily fed upon it. 
MYRMICINAE, CREMATOGASTRINI 
Crematogaster laeviuscula — (Figs. 22, 23). Head closely 
appressed to body (Fig. 22). Anteroventral body region bears a few, 
small, simple hairs, those on prothorax in 2 transverse rows, those on 
succeeding segments in 1 transverse row (Fig. 22). No evidence of 
spinules except for groups of a few papillae located laterally near 
segmentally arranged groups of pleats (Fig. 22, 23). 
MYRMICINAE, SOLENOPSIDINI 
Monomorium pharaonis — (Figs. 24-26). Head close to body, 
thorax curved but not forming a distinct “neck” (Fig. 26). Hairs of 
anteroventral body region all bifid, except for those on prothorax, 
which bears simple, branched, or bifid hairs. Apices of hairs of 
ventral region of prothorax and mesothorax (and most of meta¬ 
thorax) straight, whereas most other body hairs with hooked apices 
(Fig. 25). Spinules of thoracic region mostly point posteriorly (Fig. 
24), while those of 2nd and 3rd abdominal segments point anteriorly. 
First abdominal segment bears only 2-3 indistinct spinules. 
Solenopsis molesta — (Figs. 27-29). Head positioned as in M. 
pharaonis (Fig. 27). Anteroventral region (1st 6 body segments) bears 
mostly straight, simple hairs (some with branched tips) (Fig. 28). 
Each segment bears a single transverse row of about 8 simple hairs. 
The medial bare region between the most medial pair of hairs is 
especially wide on the thoracic segments. Remaining body hairs are 
bifid with hooked tips. Hairs papillose (Fig. 29). The rows of spinules 
on the medial region of each thoracic segment point posteriorly, 
while those of the 1st 3 abdominal segments point anteriorly. 
MYRMICINAE, ATTINI 
Trachymyrmex septentrionalis — (Figs. 30-32). Head closely 
appressed to the body (Figs. 30, 31). Body hairs, which are long, 
straight, simple (a few with slightly branched apices), are scarce, 
mostly in ventral region, and weakly papillose (Figs. 30, 31). Yen- 
