120 MANUAL OF VEGETABLE-GARDEN INSECTS 



The two species are very similar in general a])pearance but the 

 horned squash bug may be distinguished from the common 

 form by the ])rominent angles of the thorax, by the row of four 

 white spots on each side of the upper surface of the abdomen 

 and by the spine near the tip of each femur. There is also an 

 acute horn just in front of each eye (Fig. 74). The nymphs 

 are easily distinguished. In the earlier stages A. armigera has 

 the legs banded with red or brown and the next to the last seg- 

 ment of the antenna^ is widened ; in A . irisiis the legs are nearly 

 uniform black and the antennal segments 

 are of nearly the same width ; in the 

 later stages the sides of the thorax are 

 strongly dentate in A. armigera, smooth in 

 A. fri,sii,s'. The life history and hal)its of 

 the two species are nearly alike. The 

 horned squash bug may be controlled by 

 the same measures as are suggested for 

 the common squash bug. 



In the South from Florida to Louisiana 

 and New Mexico, another species, Anasa 

 andreivsi Guerin-Meneville, closely related 

 to the c(]mmon squash bug, has recently 

 been reported as injurious to cucurbits. The adult of this 

 species is more slender and of a lighter color than the common 

 form but the insect does not differ greatly in life history, 

 habits or the nature of the injury inflicted. The egg and 

 early stages have not been described in detail. 



This su])tropical squash bug may be controlled by the 

 measures recommended for its northern relatives. 



Fig. 74. — The horned 

 squash bug ( X 2). 



Reference 

 U. S. Div. Eiit. Bull. 19, pp. 2H-'M. 1S99. 



