98 



r September, 



Scutulata — though still belonging to the stifFer type, is yet an 

 advance toward the other ; being more slender and elongated in form, 

 while still retaining the spiracular ridge, the great rugosity of skin, 

 and the tapering to the head. When full-grown, about three-quarters 

 of an inch long ; slender, flattened, front segments more rounded, head 

 notched and moveable ; the front and hinder segments very short, so 

 that the legs appear as if placed close together at either extremity. 

 In repose it keeps the front segments bent down, but the head and 

 neck turned up again, in an uncomfortable-looking attitude, suggestive 

 of a "crick" in the neck. Colour pale ochreous, a brown double 

 dorsal line, showing strong on the head, faint on the front segments, 

 confluent and strongly marked behind ; a brown sub-dorsal line, very 

 plain and strong on the head to the fourth segment, then almost lost 

 till it becomes strongly marked again on the hinder segments, but its 

 place is marked at the segmental folds by a pair of dots ; on segments 

 5 to 9 pale brown oblique dashes reaching from the dorsal to below the 

 sub-dorsal line ; the spiracles black, placed on a whitish ridge ; belly 

 darker than the back, being suffused with blackish, some darker dashes 

 under the spiracles, and a darker, irregular central line. 



These larvae formed compact little cocoons in the sand, and one 

 bit up a piece of paper, and made itself a very neat little envelope. 



Bisetata. — Putting imitaria in its place as the lengthiest of the 

 Acidalia larvae, and rusticata as the stumpiest, hisetata seems to occupy 

 a middle station, and, as far as I have seen, to form the connecting 

 link between the two forms ; being more slender and of more uniform 

 bulk than the short larvae, and more rugose than the long ones. 



When full-grown, length about three-quarters of an inch, in form 

 slightly flattened, slender, tapering very gently towards the head, 

 which is notched, and scarcely smaller than second segment ; skin 

 rugose; bristles slightly clubbed; position in repose something like 

 that of scutulata. The colour is variable ; I think I have seen three 

 good varieties. 1. Ground colour dingy drab, warmer on the back, 

 and duller below ; the six segmental folds between 4 and 10 showing 

 as broad blackish-brown bands round the body, and shaped on the back 

 by some dark oblique dashes, which reach to the spiracles, into a sort 

 of broad, clumsy A, pointing forward ; there is a double dark brown 

 dorsal line to be traced where the ground in the middle of each segment 

 allows it to be seen. 2. This variety was so dark on the back that the 

 segmental folds were no darker than the ground, but the space between 

 the double dorsal lines was distinctly paler throughout, and the oblique 



