20 INSECTS INJURIOUS TO GARDEN AND ORCHARD CROPS. 



19. Howard, L. O. < American Gardening, v. xiv, p. 210. April, 



1893. 



Short popular account. 



20. Smith, J. B. < Entomological News, v. iv, pp. 123-125. April, 



1893. Figs. 



A note discussing the relative differences between the mandibular structures 

 of the herbivorous E. borealis and the carnivorous Concinella 9-notata, illustrated 

 with two original figures. 



21. Smith, J. B. < Entomological News, v. iv, pp. 197-199. June, 



1893. 



An epitome of the life history and habits of the species, with three original 

 photographic illustrations of all stages and work. 



22. Smith, J. B. <Bul. 94, New Jersey Agl. Exper. Station, pp. 



410. July 2, 1893. Figs. <Eept. N. J. Agl. Exp. St. for 1892 



(1893), pp. 476-482. 



A six-page illustrated account. 



23. Smith, J. B. <Insect Life, v. vi, p. 187. Dec. 8, 1893. 



Brief mention of the rarity of the species in New Jersey in 1893. 



24. [Sirrine, F. A.]— Bul. 75, n. s., N. Y. Agl. Expt. Sta., pp. 419-420. 



Short popular economic account, with original figure of beetle. The species 

 stated to be '' becoming more and more abundant every year" on the western 

 half of Long Island. 



25. Key, T. J. — Southern Agriculturist. July 15, 1895. 



Correspondence with T. C. Dawson, who sends specimens "that are destroy- 

 ing the melon vines'' at Wetumpka, Ala. 



In addition to the above, brief popular accounts are given in the following 

 text-books: Packard's Guide to the Study of Insects; Smith's Economic Ento- 

 mology; Comstock's Manual for the Study of Insects. In the last-mentioned 

 publication (p. 536) an original illustration is furnished of the insect in three 

 stages. 



LIFE HISTORY OF THE COMMON SQUASH BUG, 



{Anasa tristis DeG.) 

 THE NUMBER OF STAGES IN HETEROPTERA. 



Examination of a lot of Anasa armigera, obtained in all stages in the 

 latter days of September, 1897, failed to discover more than four dis- 

 tinct stages in addition to the egg aud adult, although there was more 

 than a suspicion that at least one other stage was present. Owing to the 

 lateness of the season the species could uot be followed through all 

 its molts. 



The late Dr. Riley, in his Seventh Missouri Report (p. 21), and in the 

 report of this Department for 1887 (p. 59), in treating of the chinch bug, 

 Blissus leucopterus, mentions only the newly hatched larva, the larva 

 after the first molt, and after the second molt, and the pupa, or four 

 preparatory stages in addition to the egg. Three of these stages are 

 figured on plate I of the report of this Department for 1887. Prof. S. 

 A. Forbes, in his report as State entomologist for Illinois, for the year 



