130 
I kept several of the wasp grubs in jars, and when their sup- 
ply of food gave out, fed them with locustids which I had cap- 
tured, having cut off their legs and portions of their heads so as 
to render them harmless. These were readily devoured. Three 
of the grubs reached their full growth and spun cocoons, (Fig. 
65). The full-fed larva is of a dirty whitish color and has a 
straight length of about 36 mm. and a width, below its middle por- 
tion, of 9mm. The head is small, the lateral body fold distinct, 
more scalloped anteriorly, and the posterior end of the body 1s 
broadly rounded-truncate. Compared with the larva of the big 
black Macromeris wasp, that of mutica 1s more slender and has 
a smaller head. The cocoon has a length of about 39 and a 
width of 14.5 mm. There is plenty of scaffold silk work. It is 
rich golden brown, darker, stouter and stronger than that of the 
related umbrosus, and consists of two well- separated envelopes. 
It is widest above the middle and tapers mere gradually poster- 
iorly, where it terminates in a sort of nipple. 
I brought three of these cocoons with me to Hawaii. Next 
year, May 28, 1918, becoming impatient, I cut open the cocoons 
to find two mouldy and the third containing a resting larva 
(Fig. 65). As in many resting wasp larvae, the color is now 
yellowish and the segmentation more deeply indicated and the 
anterior part well arched. I was fortunate in seeing this big 
grub transform into a~pupa. ~On Mays 30; 1:00 -p2-mssthe 
anterior or thoracic portion of the larva had become some- 
what more swollen and stiffer; on May 31, 7:30 a. m., itwas 
becoming loose and shrivelling, especially at the posterior ex- 
tremity; now the body appe eared more rounded and the thorax 
especially, from its quick development, arched and tight-skinned. 
As the larva hes on its back, some of the pupal appendages 
may be seen under the thin skin. At approximately 10:15 a. m. 
the larva was squirming gently, the skin split back of the head, 
now partly collapsed on the well-humped thorax, which is sepa- 
rated from the abdomen by a clearly-defined waist. The pupal head 
being exposed showed the base of the antennae, as cramped 
organs doubled up and folded on the larval breast; they gradu- 
ally straightened out and appeared to be issuing from the rela- 
tively small larval head case, reminding me of the vast quantity 
of material that the magician pulls out of his little wooden box. 
Iverything was growing while emerging free of the larval skin 
and virtually pushing the latter back. The ovipositor or sting- 
sheath could be seen in the middle of the eighth ventral segment 
of the larva, and therefore well forward of the tip of the ‘abdo- 
men towards and near which it will eventually migrate. The 
freed mouthparts lengthen considerably and in an hour the pupa 
