110 



4. Aleurodes aceris, n. s. 

 Order Hemipteea. Family ALEURODiDiE. 



(Plate XI, FigP. 4and5.) 



I have noticed, for several years, a peculiar bark louse upon the 

 leaves of - the maple, but have not bred it 'until the present year. 

 The fully developed pupal scale is oval in general outline, somewhat 

 lyrate, broadest posteriorly, contracted in front of the middle. 

 Margins entu'e, surface densely granulated. The color is choco- 

 late, mottled with white, the white varying in amount and tending 

 to form three transverse bands. The central segmented area is 

 usually irregularly mottled with white, and a quadrate patch, in- 

 cluding the vent, is almost always brown ; but, otherwise, the color 

 may vary from nearly uniform brown to almost white. Outline 

 sometimes slightly emai'ginate posteriorly. Length, .095 of an inch ; 

 greatest width, .045 ; width at anterior fourth, .0E6. 



The imago is pale yellow throughout ; legs and abdomen paler ; 

 wings milky white ; rostrum black at the extreme tip ; veins yellow- 

 ish ; first joint of the antennae scarcely longer than wide, the re- 

 maming joints filiform, the second nearly as long as the four fol- 

 lowing and about four tnnes as long as the first, the fourth longer 

 than the third, the third and fifth about equal, the sixth fusiform. 



At Tamaroa, in Southern Illinois, soft maple trees were found 

 badly infested by this bark louse, but elsewhere it has occurred in 

 only trivial numbers. There are apparently two broods of this species 

 in a year, scales collected in August, 1883, emerging April 10 to 

 24, 1884, and others, collected during the present summer, emerg- 

 ing August 4. From these larvae several hymenopterous parasites 

 belonging to the genus Elaptus escaped September 0, the species of 

 which is apparently new. 



Elaptus aleiirodis, U.S. Plate XI. Fig. 6. Female. Length .03 of an 

 that of inch ; the head .005 inch ; front wings .032 of an inch long and 

 .001 inch wide ; posterior wings .0032 inch wide at the widest point ; an- 

 tennae as long as the head and whole body ; scape stout, arcuate, rising 

 to the top of the head, about as long as the three following joints, 

 nearly smooth, as is also the second joint ; remaining joints densely 

 pilose; the club not jointed, as long as the three joints preceding; 

 first joint obconic, second about the same length but narrower. 

 Color black, surface shining, abdomen alutaceous, head and thorax 

 punctured, antennae yellow, legs entirely yellow, femora and tibiae 

 of the middle and posterior legs black^ their tarsi yellows 



Described from three specimens bred from Aleurodes aceris. 



5. Lyi/us i)tvltus, Say. 

 Order. Hemiptera. Family Capsid.e. 



(Plate XII. Fig. 1.) 



Brief mention may properly here be made of a species whose in- 

 juries to vegetation have not hitherto been serious, as far as known, 



