82 



PSYCHE. 



[July, igoo. 



long. Femur with troclianter 76. Tibiu 32. 

 Tarsus 52. Claw 16. Tarsal and claw digi- 

 tules quite long, slender and knobbed. Cau- 

 dal tubercles quite large, 40 long, 28 broad at 

 the base, each bearing one long bristle 120 

 long, and three short stout spines 16 long. 

 The marginal spines a little curved and point 

 backwards, these are 12 long. The space 

 between each being 20. All the measure- 

 ments are in micromillimeters. Hab. — 

 Lawrence, Mass., on scrub oak. ^uercus 

 ilicifolia, July 28, 189S. It is very distinct 

 from all other American Kermes, and the 

 smallest vet found. Its nearest ally is evi- 

 dently Kermes cerifeiiis Eiirh. but is easily 

 separated from that species, by its much 

 smaller size of the ? scale. The young 

 larva also differ very materially from K. cer- 

 iferns and cannot be confounded with K. 

 nigropunctatKs which is large and pale och- 

 reous, with minute black spots and a median 

 longitudinal depressed line. It is nothing 

 like K. pettiti Ehrh. which is a very com- 

 tnon species in Massachusetts. This species 

 is named after Mr. A. F. Perry for his many 

 kind favors shown me in my laboratory 

 work. 



The Larvae. All of our young larva 

 of Kermes seem to be oval or elliptical 

 in shape ; and all very similar structur- 

 ally, excepting K. puhesicns, described 

 below. They have well developed 

 caudal tubercles, with one very long 

 setae, and usually three stout spines, 

 excepting in K. boguei, which has the 



long setae and only one spine, and K. 

 gillettei, which has the long setae and 

 two spines. The antennae are all si.x 

 jointed, and very similar in detail, with 

 the third joint longest, except in K. 

 ceriferus and K. pubescens, where the 

 sixth joint is a little the longest. For 

 convenience, I give here the antennal 

 formulais of those not included in the 

 table below. K. gilkttei (36)2(45); 

 K. boguei, 36(21)45; K. cockerel li, 

 36(12)45; ^- nigropiinctatus, 36(45)2; 

 A', ceriferus (63) (12) (45); and K. aus- 

 //;i/, 36 (25) (41) . The following tables 

 of measurements are in micromillimeters. 



Antennal Segmenis of the North Easthkn Species. 



Front Legs of the Same Specihs. Length and 

 Breadth. 



Otiier Characters. 



Length Breadth Tubercle setae Tubercle spines Marginal spines 



212 



200 



'32 



76 



24 



24 



23 



16 



16 

 18 



