third joint is nearly three times as long us the first and is narrower 

 throughout, near the apex and on the outer edge is an abrupt en- 

 largement, which at once resumes the former width, the sides are 

 quite thickly filled with strong and long hairs. The fourtli to tenth 

 joints are similar in size and form, each decreasing in length and 

 having the surface covered with hairs, the tenth and last joint 

 having the apex rounded. The surface of the antennae is quite re- 

 gular, the variations slight. 



The thorax is large and rounded at the sides, the greatest en- 

 largement being at the mesothorax. The sides are smooth and uni- 

 form, the entire portion thick, and the central portion of a deeper red 

 than at the sides. The prothorax is rounded in front, is at that 

 point the smallest, and increases rapidly until the posterior margin 

 is twice the size of the anterior. 



The wings are two in number, they are joined to the prothorax, 

 and are membraneous and delicate. AVhen compared with the siie of 

 the body they are very large, and extend over the abdomen. When 

 folded at rest, they are nearly half as wide as long, and the superior 

 margin is nearly a straight line, having near the middle a reflex nerve. 



The ends are rounded, and the inferior margin is concave. The 

 marginal vein is strong but decreases as it extends. Near this 

 marginal vein a sub-marginal vein commences which soon subdivides 

 into two parts, the former following near the marginal vein and parallel 

 with it, having also the reflex curve, while the second division follows the 

 inferior vein and both end abruptly a short distance from the end of the 

 wing. The entire wing is evenly covered with a whitish, mealy 

 substance, and forms a striking contrast to the deep red of the 

 body and serves to make them conspicuous when in repose on tlie 

 trunks of the tree; seen in the sunlight the AVingg have a metalic 

 lustre and are as beautiful as conspicuous. 



The balancers. Fig. XIV., are prominent and large and are at- 

 tached to the mesothorax. They are two jointed, the first is large, 

 while the second joint is slender and flexible, the end is often seen 

 curled up instead of lengthened out as in the figure. 



The legs are long and slender, and covered with hairs. The 

 anterior pair, Yig. XV., show distinctly the five joints. The coxae 

 are large in all six legs but in the anterior pair they are smaller than 

 in the two posterior. The trochanter is prominent and is firmly united 

 to the femur, which is itself long and becomes larger apically, the 

 tibia is one third longer than the femur and retains a uniform 

 sleriderness throughout. The tarsus is nearly one half as long as 



