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JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 17 
other parts. Location of spines as follows: Head, three pairs of large spines and sev¬ 
eral smaller ones cephalad of transverse suture, one pair of large spines and several 
smaller ones caudad of transverse suture; prothorax, two pairs of large spines, the 
anterior one of which is branched at the base, and many smaller spines on the dorsum 
and pleurae; mesothorax, one large pair present on dorsum and several smaller spines 
on pleurae, metathorax, one small pair on dorsum and several smaller spines on 
plsurae; abdomen, spines present as in the preceding instar with the addition of 
small spines on the dorsal surface and at the lateral edges of the abdominal segments. 
Wing pads first appear in this instar, extend only to first abdominal segment. Open¬ 
ings of dorsal stink glands as in the preceding instar. 
Fourth instar: Range in length 6.7 mm. to 7.7 mm., length of first antennal 
segment 2 mm., length of front femur 2 mm. General color tawny to darker,mot¬ 
tled. Location of spines as follows: Head, three pairs of large spines and several 
smaller ones cephalad of transverse suture, three pairs of large spines and several 
smaller ones caudad of transverse suture; prothorax, very spiny, with many large 
spines on dorsum, and smaller spines on both dorsum and pleurae; mesothorax, one 
large pair on dorsum and several smaller spines on pleurae; metathorax, as in 
preceding instar; abdomen, as in the preceding instar with an increase in the 
number of spines on the dorsal surface; front femur, as in preceding instars except 
that basal spines in dorsal row are becoming obsolete, the apical spine alone now 
being well developed. Wing pads now extend over second abdominal segment. 
Fifth instar: Range in length 8.8 mm., to 10.4 mm- length of first antennal seg¬ 
ment 3.3 mm., length of front femur 4 mm. General color light tawny, mottled. 
Location of spines as follows: Head, as in the preceding instar but spines are longer, 
prothorax, very numerous, long, conspicuous, present both on the dorsum and on the 
pleurae; mesothorax, one large pair, one medium pair, and several smaller pairs pre¬ 
sent on the dorsum and many others on the pleurae; metathorax, many spines on the 
pleurae; abdomen, as in the preceding instar with an increase in the number of spines 
on the dorsal surface. Wing pads now extend over third abdominal segment. 
Bibliography 
1. Van Duzee, U. of Cal. Tech. Bull., II, p. 269-1917. 
2. Uhler, Bull. U. S. Geol. Surv., IV, No. 2, p. 508-1878. 
3. Uhler, Proc. Bost. Soc. Nat. Hist., XIX, p. 428-1878. 
4. Bueno, Hemip. of Conn., Conn. Geol. and Nat. Hist. Surv. Bull. XXXIV, p. 
689-1923. 
5. Chittenden, U. S. D. A. B. E. Circ. 87-1907. 
6. Chittenden, U. S. D. A. F. B. 1038-1919. 
7. Morgan, U. S. D. A. B. E. Bull. 63, pt. 4-1907. 
8. Ashmead, Insect Life, VII, p. 321-1895. 
9. Heidemann, Proc. Ent. Soc. Wash. XIII, p. 135-1911. 
10. Barber, G. W., Psyche, XXX, p. 74-1923. 
• 
President A. G. Ruggles: We will now listen to a paper by Alvah 
Peterson. 
