508 The University Science Bulletin. 



Shape. Elongate oval, one end slightly tapering and rounded, the other 

 smaller, sloping somewhat obliquely and bearing a crown or rosette of fifteen 

 long filaments. 



Color. Creamy white, with filaments somewhat yellowish, center of crown 

 darker. 



Seven eggs were laid by one female twelve days after mating. 

 These were not inserted in soft wood or in plant tissues, althougii 

 both were available. The female was lying close to the wet sand 

 and the eggs were laid on their sides on the sand without any regu- 

 larity or order. The next day there were three more eggs, and in 

 three more days I found six eggs hidden among the roots of water 

 plants and in slimy accumulations in crotch of a dead twig. 



DESCRIPTION OF FIRST-INSTAR NYMPH. 



Form elongate oval; very much like adult, only broader in proportion to 

 length. Head large, much narrower than prothorax and as wide as long, ex- 

 cluding the rostrum. Eyes globular, small. 



Anterior femur quite robust and armed with a single median tooth, plainly 

 \isible and closer to the base than the apex of the femur. 



Anterior coxae about half the length of their femora, and very robust. In- 

 termediate and posterior legs short. One-segmented tarsi. 



Color when first hatched pale straw yellow, becoming darker with brownish- 

 black markings. Number of days of first instar, twelve. Entire length of in- 

 sect from tip of beak to end of respiratory tube, 5 mm.; width across abdo- 

 men at widest part, 1.50 mm.; width across eyes, .75 mm.; width of shoulders 

 at base of head, 1.15 mm.; length of prothorax on median line, 1 mm.; length 

 of respiratory tube, a trifle more than .50 mm.; length of anterior femora, 1.40 

 mm.; length of anterior tibiae, .70 mm.; length of anterior tarsi about .25 mm.; 

 length of anterior coxae, .70 mm.; length of intermediate femora, 1.40 mm.; 

 length of intermediate tibiae, 1.00 mm.; length of intermediate tarsi, .20 mm.; 

 length of posterior femora, 1.25 mm.; length of posterior tibiae, almost 1.50 

 nmi.; length of posterior tarsi, almost .50 mm. 



Since writing the above I have reared the insect through from the 

 beginning. There are five instars. 



