INSECTS INJURIOUS TO THE BLACK WALNUT. 333 



13. Caiocala subnata Grote. 



This is said by Mr. Angus to feed ou the waluut. The moth is very 

 much like C. neogama, but generally larger, with the lines and mark- 

 ings more diffuse, and tlie teeth of the M of the transverse posterior 

 line very strongly produced. It expands from 95 to 105"*°', though in 

 one case only 70"'™. Mr. Hulst doubts whether this be distinct from 

 C. neogama. 



14. Catocala piatrix Grote. 



Mr. Koebele finds that the caterpillar feeds on the walnut, hickory ,^ 

 and persimmon. 



Moth. — Fore-wiugs dark wood-brown, or blackish brown, slightly silky, darker 

 shaded in the sub-basal space ou the costa, above the discal cell, and subapically . 

 the transverse anterior line geminate, the outer line sometimes less distinct; th& 

 reniform spot shaded with black; the subreniform pale; transverse posterior line 

 with the M prominent, and sinus heavy; subterminal line geminate with grayish be- 

 tween. Hind wiugs deep yellow, internal margin and base dusky ; median band not 

 much constricted. Expands 85 to 95""". Eastern United States. (Hulst.) 



15. Catocala moestuosa Hulst. 



This is said by Mr. Hulst to feed on the walnut, but there is no de- 

 scription of the caterpillar. 



Moth. — Fore-wings very nearly the color of C. vidua (p. 178); lines diffuse, not 

 strongly distinct; transverse posterior line with the M strongly marked; sinus com- 

 paratively small; no basal dash; reniform spot reddish; a reddish band beyond the 

 transverse-posterior line ; transverse-anterior line clouded with black at the costa, 

 and a heavy diffuse black shade from the costa above the reniform through the M of 

 the transverse-posterior line to below the apex. Hind wings black, dull gray at base ; 

 fringe white, ends of the veins black. Expands 95 to 105™™. Southern States, 

 (Hulst.) 



16. Geometrid caterpillar. 



This caterpillar was observed on a walnut at Brunswick, Me., August 

 20. It died in confinement. lu this larva ou the abdominal segments 

 (except the eighth where they are transverse) there are four dark glassy 

 bottle-green piliferous dorsal spots, arranged in a short square. On 

 the first abdominal segment they are of equal size, but the two hinder 

 ones are on a slight transverse ridge, the ridge being enlarged under 

 the tubercles. On the second abdominal segment the two hinder pilif- 

 erous warts are no larger than the anterior, but are situated on a large 

 conspicuous saddle-shaped transverse hump, which is swollen at the 

 origin of each tubercle. The caterpillar is further adapted for protec- 

 tion from its resemblance to a walnut twig by being deeply notched^ 

 each notch like a leaf-scar ou the twig. 



In Caripeta angustiorata of the pine, the transverse posterior, saddle- 

 shaped ridges bear two posterior piliferous warts. They have a decided 

 resemblance to the leaf-scars on the redder parts of the twig, which in 

 its ground color the caterpillar mimics. I have observed that this and 



