138 FAMILY V.— CEDIPODIN^. 



natino- bands of black and white, three of each ; posterior 

 tibiae dusky, black or blue-black, with a pale ring near the 

 knee; spines black. The male insect is illustrated in Fig. 78. 



Measurements: — Male: Total length, 23-26.5 mm.; of 

 body, 17-19 mm. ; oftegmina, 17.5-20 mm. ; of hind femora, 

 11-12.5 mm.; of antennae, 6-7.5 mm. Female: Total 

 length, 28-30 mm.; of body, 26-28 mm.; of tegmina, 20.5- 

 23 mm.; of hind femora, 13.5-15.2 mm.; of antennae, 6-7.5 

 mm. ' 



This is a very common species in all parts of the state 

 visited by the w^riter at the proper time. As soon as the 

 snow disappears and the ground becomes w^arm enough to 

 start vegetation, this insect becomes active, and may be 

 found as larva, pupa and adult. The latter, when disturbed, 

 fly readily, and to some distance, making a loud clattering 

 sound. They disappear about the middle of July. The 

 colors of the wings vary greatly ; in some the brilliant yellow 

 is replaced by a very light yellow^. This is our most common 

 form near St. Anthony Park. 



Arphia xanthoptera Burm. 



Thorax, generally, though not always, darker than in A. 

 sulphurea; sometimes with tw^o yellow^ dots on the middle of 

 the sides of the pronotum, one above the other, and the front 

 and hind margins dotted with olive; but these markings are 

 not uniform . The dark ray of the wings near the front margin , 

 not more than half as long as in sulphurea, 

 extending but one-third the distance to 

 the base; this is remarkabU^ uniform. 

 Posterior femora generally with tw^o ob- 

 Fig so.— Arphia I'quc dull ycllowish bands on the exterior 



xa«t/,oj,-tera.lat^eralview ^^^^^ ^^^ ^j^^ ^ p^j^^. ^^^ ^^^^ distiuct 



ring near the apex. The yellow of the wings is usually much 

 deeper and more inclined to a saffron color. It differs also 

 in being larger, in some cases the length of the female from 

 tip to tip of wings being two inches. The foveola of thever- 



