SUBFAMILY I. PSEUDOMOPIN.T3. 75 



The ootheca of the Croton bug is very light brown, a little over 

 twice as long as broad, 7.5x3.5 mm., with the sides somewhat flat- 

 tened and the edges parallel. Within it the eggs, thirty-six in 

 number, are arranged in the usual two rows. It is carried about 

 by the mother roach for several days with from half to three- 

 fourths of its length protruding from the abdomen, and when 

 dropped in a favorable place the young, evidently very soon, 

 emerge from it; for in a bottle in which a female with protruding 

 ootheca was placed at eleven o'clock p. m. the young were found 

 to have emerged on the following morning at eight. They were 

 then wholly white, except the lateral edges of the abdomen, where 

 a blackish tinge was evident. By five o'clock in the afternoon of 

 the same day, having meanwhile eaten their fill of moistened 

 wheaten bread, they had become too large for their skins, and had 

 moulted for the first time. They then measured 3 mm. in length, 

 and the head, pronotuin, abdomen, and apical half of antenna? 

 were black, while the other two thoracic rings and the basal half 

 of antenna? were a grayish white. The half grown young are very 

 dark brown, with the first four or five segments bordered with 

 yellow, and with traces of a lighter median stripe. 



VI. ISCHXOPTERA Burmeister, 1838, 500. (Gr., "slender" + 



"wing.") 



As restricted by Hebard (1917a, 01), this genus is represented 

 in North America by only one species of medium size and less 

 delicate structure than in the preceding genera. It has the head 

 elongate; ocelli distinct; disc of pronotum in male with two 

 broad, elongate impressions which converge behind; tegmina of 

 male much surpassing the abdomen, their discoidal sectors weakly 

 radiating; ulnar vein of wings with three to seven basal branches 

 incomplete; tegmina of female and sixth dorsal abdominal seg- 

 ment of male as described in generic key; seventh dorsal abdomi- 

 nal segment of male with a narrow elevated ridge between the 

 armed projections of the sixth segment; lower front margin of 

 fore femora armed as described in k v/" of key, and also with three 

 stout unequal spines near apex; tarsi elongate, small arolia 

 present. 



18. ISCHXOPTERA DEROPELTIFOEMIS (Brunner), 18C5, 87. Dark Wood Roach. 



Males very slender, their tegmina notably narrow; females larger 

 and stouter. Color uniform dark mahogany brown, shining; tegmina of 

 males often a paler brown; wings of male transparent, slightly infus- 



