127 



CHINCH BUG. 



Bllssiis IniropliTiiK Say. 



Til?: Kgcs. — This (MiIarj^tMl model represents the form of the egg 

 uikI the terminal cap. The eggs are thi'ee-himdredths of an inch \ong^ 

 the top heing sipiarely docked and .surrounded by four round tubercles 

 near the center. Color from pah; whitish to aml)ei-. 



FiKST LakvaIv Stagk. — This stage, representetl enlarged in this 

 model, dirters from the adult in being more elongate and in having 

 two-jointed tarsi, the head broader and more rounded and the joints 

 of the l)ody subecpial. The prevailing color of the whole body is red. 



Second Larval Stage. — After the tinst molt the form represented 

 in this enlarged model is assumed. The red becomes a In'illiant ver- 

 milion and contrasts with the pale band across the middle of the body, 

 while the head and prothorax are dusky and coriaceous. Two broad 

 mai'ks appear on the mesothorax and the second, foui'th. and Hfth 

 abdominal sutures, and one at the tip of the abdomen. 



Pupa. — The pupa shown in this enlarged model approaches still 

 more nearly the form of the adult, and is not unlike the last larval 

 stage except in being darker and in the appearance of wing-pads, 

 which extend almost across the pale basal abdominal joints. 



The Imago. — The mature insect which is re])resented enlarged in 

 this model is elongate, blackish, and with numerous hairs, or pubes- 

 cense. Its length is about three-twentieths of an inch. The outer 

 wings are whitish, with a st long distinctive black spot. 



THE SAN JOSE SCALE. 



Aspiflidhix jH'riilclosiix Coiiist. 



Ten enlarged models are exhibited illustrating the life cycle of this 

 pest, which has caused more damage to the fruit industry and been 

 the object of more legislation than any other insect. Its small size 

 and inconspicuous appearance often leave it undetected until the 

 infested trees are beyond recovery. The scale may l)e killed by fumi- 

 gation or spraying. 



Enlarged models are exhibited of the ^p'r.'^f and sn'niiil htrriil st(i(/e(<^ 

 of the i/oinuj croirl!)tif lami^ nedrhj fi(ll-<iroini hinui, iikiIc jtro-jntpa, 

 male }>n]>(i^ adult niali\, aditlt feinale^ and of the luilf-<irown Hcale^full- 

 (jrown male scale^ 'AwA fiill-<fr<niin ftinale f(cah'. 



THE ASIATIC LADY-BIRD. 



( 'liilncDrUH Hiiiiili.1 Ki>s.si. 

 Two enlarged models are exhibited illustrating the adult and the 

 larva of this insect, which was introduced by the l'. S. l)ei)artinent of 

 Agricultui'e from China, w heie it i> the iinjxntant agent in keeping the 

 San flose scale in check. 



