﻿OF THE STATE ENTOMOLOGIST. 159 



find, and quite impossible to follow, the sexed individuals after hatching. In the pre- 

 pared jars, where the tomentose leaves of Labrusca were kept, 1 obtained more satis- 

 factory results; for, while a few eggs were laid on the surface of the ground, especially 

 in the space between the earth and the glass, and a few others on the upper side of the 

 leaves, by far the larger number were attached to the under surface, generally by one 

 «ndand thrust between the natural down of the leaf— evidently showing that this is 

 the natural nidus chosen. The winged mothers die soon after ovipositing, and tiieir 

 shrivelled and decaying bodies adhere to the leaf-down. 



By taking a leaf bearing eggs that are eight or nine days old and enclosing it in 

 a smaller, tightly corked tube, the sexed individuals hatch freely, and are easily 

 watched. This hatching takes place on about the tenth day after deposition, with our 

 late September temperature. The egg perceptibly enlarges during this time, a fact 

 that might be explained by endosmosis of the leaf-juices were it not known that the 

 same fact holds true of many soft insect eggs that are not attached to succulent leaves 

 or other living vegetation. The red eyes are seen through the delicate egg-shell early 

 in the development of theembryon, and just before hatching the joints of the body are 

 perceptible. The egg-shell is so delicate that in the process of hatching it is usually 

 pushed back in folds, and is left as a little wrinkled, whitish mass : occasionally, how- 

 ever, it more nearly retains its original form. 



The sexed individuals are at once distinguished from all the other forms which 

 this interesting species assumes by the obsolete mouth-parts, the sexual organs and the 

 more highly developed nervous system : otherwise, in size, in smoothness and in obso- 

 leteness of the basal joint of tarsus, they most closely resemble the newly hatched 

 larva. 



The female (Fig. 48, «, h) measures 0.40 mm , and is about one-third as broad. The 

 body widens slightly behind, and the two narrow anal joints of the abdomen swell out 

 prominently from the others. A mere swelling between the two anterior coxae repre- 

 sents the mouth-parts. The antenna more nearly resemble those of the wingless, ao-a- 

 mous § than of the winged one, having but one rather small plate near the end of the 

 third joint, which third joint is generally constricted at base so as to give it a some- 

 what more pedunculate "appearance than in the other forms ; this does not always ap- 

 pear, however, as in some of my mounted specimens the diameter of the joint from 

 base to tip is nearly uniform. The minute, black, dorsal, hair-like points, as also the 

 dusky subventral warts each side of sternum just outside the coxio, are visible as in the 

 agamous $ ,, but not the six pale medio-sternal tubercles between the legs. The legs 

 have the tibire rather heavy terminallj'-, and the tarsi show no distinct basal joint : the}'- 

 otherwise precisely resemble those of the agamous $, and are, together with the an- 

 tennfc, similarly more dusky than the body. In most of my mounted and transparent 

 specimens (9 examined), two irregularly contorted nervous chords with numerous finer 

 ramifications are distinctly visible, one each side, crossing and joining on the prothorax 

 and metathorax. 



The male differs in no respect from the female, except in the bulbous penis taper- 

 ing to a point; in broadening, if anything, before rather than behind, and in being 

 about one-fourth smaller. Barring the somewhat shorter black points, he is the coun- 

 terpart of the same sex in a larger species Uaryo'caulis) which I have already illustrated 

 and the figure of which I here introduce (Fig. 48, e.) 



The single egg, which the true female carries develops rapidly after she is born, and 

 on the second day already occupies nearly the whole body, as shown at Fig. 48, a. It 

 is delivered the third or fourth day, and this generally happens independent of impreg- 

 nation. 



This impregnated egg, which I have so far obtained only in ray small tubes, is 

 smooth like the other eggs of the species, but more elongated or ellipsoidal, and but 

 very slightly broadest behind. It measures 0.32 mm., and is nearly three times as long 

 as broad, bright yellow when laid, it soon acquires a deeper, yellowish-green color. 

 The posterior end is generally thickened or roughened by what is probably a mucous 

 secretion that serves to attach it. 



