242 J. L. HANCOCK. 



observe a few more details to the process. Eggs when first laid are 

 a creamy white, becoming brownish with age ; it is 1.5 ram. in length, 

 cylindrical, curved a little and rounded at the ends. The anterior 

 end is laid pointing upwards ; in those at the top the extremity is 

 provided with a little sharp point. When the young is about to 

 make its exit a rent occurs down the middle from before backwards. 

 In one case the insect simply raised up and backed out to extricate 

 itself, then shedding the amnion as briefly described above. If there 

 is ample room for the eggs as there was here, the pressure exerted 

 within by the embryon bursts the shell at the point of least resist- 

 ance along the back beginning at the anterior end, but not always 

 with definite precision. Most of the eggs examined seemed com- 

 pletely divided longitudinally through the middle, while others 

 showed that emergence had taken place from forward end, passing 

 between the neighboring eggs up the shallow burrow. The separate 

 masses or pods contained approximately thirty eggs each. The 

 young take on pigment a few hours after hatching and very closely 

 resemble each other. The progeny at this time is perfectly equipped 

 to launch into the world about. 



Young of Paratettix just hatched from the egg. — Pale yellowish 

 white, length 1.5 mm. In profile head large, rather swollen, front 

 margin convexed, summit rounded, angulate ; eyes deep reddish 

 brown situated high, the crown showing slightly in outline above ; 

 antennje short, enlarged toward the end with ten articles; pronotum 

 in the form of small shield about as long as the height of the head, 

 lightly encroached on the head, cut-ofi" in front, slightly constricted 

 directly over the attachment of first leg showing as a slight inden- 

 tation near the anterior dorsal margin ; lobes rounded oflT below in 

 front, deeply grooved behind, forming a sinus just above and in front 

 of second leg; pronotum sliced and sloped thin at the sides abru})tly 

 into small posterior process slightly tilted up at the apex. The 

 a[)ical end passes back a third of the length of the posterior fenuir ; 

 median and very small lateral carina present; borders of posterior 

 lemur convexed. Abdomen extending almost to the posterior knee. 



Gen. TET'ri<;il>E.4 Scudd. 



1. T. acuta Morse (Plato VII, fig. 13, 13(0. 

 ("liicago and Riverside, 111. 



2. T. parvipeiiniM Harris (Tlate VII, fig. 12, 12u). 



Until recently this species was designated T. lateralis. Morse 



