118 



HALF HOURS WITH IXSECTS. 



[Packakd. 



Another Lecanium found on the leaves of Platjcerium 

 alcicorne is L. platycerii. The scale is regularly oval, flat- 

 tened, slightly convex above, with a slight ridge along the 

 middle of the body. In dry specimens, especially the smaller 

 ones, there are minute ridges radiating from the middle to 

 the outer edge. The body of an adult female (Fig. 83, and 

 larva, enlarged) is entirely flat beneath, finely granulated, 

 and pale brown above. The 3'oung are thin and flat, scale- 

 like, and of a light reddish brown color. 



The Plant House Aleiirodes. — Belonging to a group allied 

 to the scale insects is a minute white-winged insect which 

 may be found in all its stages on fuschias, the Salvia splen- 

 dens, and out of doors in summer, the tomato, rising in 

 clouds like snow flakes, when disturbed. These pretty, ac- 



FlG 



Ak'UiodL'.-' 



five beings (Fig. 84, en- 

 arged) have pale, yellow 

 bodies and pure white, un- 

 spotted, powdery wings, with 

 dark red eyes ; the beak is 

 very long and dusky at tip, 

 and reaches beyond the base 

 In this genus both sexes are winged. 



Fig. 85. 



of the thorax. In this genus both sexes are winged. The 

 young of this species, the Aleurodes vajwrarium of European 

 authors, is broad, oval, thick, with a longitudinal ridge ; the 

 abdomen is wrinkled transversely, the head and thoracic seg- 

 ments being smooth. It is three-hundred ths of an inch in 

 length. 



The pupa (Fig. 85) is convex, rather thick, oval, ellip- 

 tical, with a fringe of hair-like filaments around the edge of 

 the body, from the top of which arise from six to nine long 

 threads. 



The Tlot-hotise Thrips (Fig. 8G, magnified). — This is one 

 of the greatest pests in our hot-houses. It is the Heliothrips 

 hcemorrhoidalis of Burmeister. In all its stages it may be 

 found puncturing the leaves of liliaceous plants, azalias, 



22 



