43 
eyes; there are also four medio-dorsal tubercles placed in a square, 
and three to four along the lateral margin of the prothorax; two 
tubercles medio-dorsally and three to four each side of the meso- and 
metathorax; one or two median ones on the three or four basal seg- 
ments of the abdomen and sometimes one on the remaining segments; 
there is also one dorso- and one ventro-lateral tubercle on each abdomi- 
nal segment, the last segment bearing from four to six tubercles 
along its posterior margin, from each of which issues a white and irides- 
cent, truneated, and curved waxy rod. The head is transversely and 
deeply concave in front of theeyes. Antenne short and four-jointed. 
The two basal joints are short, each bearing a short bristle; the 
other two are longer and subequal in length; both are slightly 
annulated, and both bear a small, sensorial thumb; the spur of the 
ae ET ET aN 
Sree | 
Ribot i 
Oh Coes aa a <— 
FIG. 23.—Hamamelistes spinosus; a, male, dorsal view; b, antenna; c, female, dorsal view; d, 
antenna; e, ventro-lateral secretory gland—much enlarged (original). 
last joint is short and stout and bears two or three small hairs at the 
apex. The rostrum is stout and reaches beyond the posterior coxe. 
The legs are long and stout, with their tarsi, claws, digitules, and 
bristles highly developed. Male and female larve are difficult to dis- 
tinguish from each other. 
Siath generation, second to fourth stages.—In these stages they 
resemble still those of the first stage, except that they grow gradually 
larger, that the antenne increase in length, and that the two last 
joints tend to become more or less distinetly fused, the division 
between them being, as a rule, indicated by a very minute knob. 
Sirth generation, mature female (Fig. 23).—-The mature females 
are of the same pale color as before and about 1"" in length, they are 
broadly oval and have lost all traces of the secretory tubercles, but 
have acquired instead of them rather long and stout bristles, some of 
