310 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



lateral pieces show a distinct flexure on each side. The wings are in- 

 serted on the upper portion of the widest part of the thorax, each side of 

 the apodema. Beneath, the thorax is comparatively flat. The proster- 

 num is narrow and triangular, allowing the cox* of the anterior legs to 

 approach comparatively close to one another. The mesosternum is a 

 large flat, sub-hexagonal plate, causing the coxae of the middle legs to 

 be widely separated. The meta.^ternuiu is short and broad, causing the 

 coxae of the posterior legs to be also widely separated. 



The integument of the thorax is entirely rigid except the region about 

 the neck, which appears to be flexible and contractible, so that often the 

 head appears to approach closer to the thorax than is shown in the 

 figure. The proscutum and apodema are shining dark chestnut brown— 

 the latter being the darker. AH other parts are sparsely furnished with 

 fine liairs, and are of anochreous brown, varying in darkness according 

 to age. The legs, like the antennae, are of a pale ochreous color, with -a 

 decided rosy tint when alive. 



The wings when fully developed are thin and membranous, as long as 

 the entire body from the front of the head to Che base of the penis ; 

 nearly half as broad as long, with the front margin nearly straight, ex- 

 cept a slight bending out near the base, and the posterior margin strong- 

 ly and regularly curved. Tliey are each furnished with a rather stout 

 vein at a short distance from the anterior margin, and a much more 

 slender vein directed somewhat parallel to the posterior margin ; both 

 veins appear to lose themselves before reaching the margin. The wings 

 are scarcely transparent, and are somewhat whitish or highly irridescent, 

 according to the direction of the light. The anterior portion, especially 

 between the vein and the edge, is strongly rose-colored. The surface is 

 covered with numerous very fine hairs which are longer on the margins 

 and more numerous in the costal region. They are directed outwards 

 on the margins, but appear to stand erect on the rest of the surface. 



I have never succeeded in finding any indications of the balancers or 

 v?^ing hooks which are so characteristic of the males of the (Joccidc^ in 

 g^eneral, with but one doubtful exception. This last was in the dissec- 

 tion of a fresh specimen in August,. 1879, and as I saw but one I was 

 not able to prove conclusively that it might not be a fragment of some 

 other part of the integument. Xotwithstanding that I have carefully 

 searched many scores of specimens under the microscope both alive and 

 variously preserved, both transparent and opaque, without detecting 

 any trace of a balancer, yet I believe they do exist and will eventually 

 be found— though probably in an imperfect form, or held in a position 

 diSicult to see. 



The legs (fig. 38&iare long and slender.* as compared with those of 

 the female; and are somewhat densely! covered with long slender flexi- 

 ble hairs. With the exception of size and the mode of attachment of 

 the coxae they all appear to be exactly alike. The coxae of the front legs 



♦Miss Smith says "stout." Am Nat., 1878, p. 660; ~th Rej)ort Ent. III., p. 12i) 

 t Mis8 Smith says " gparsely." — loc. cit. 



