140 HEMIPTERA-HETEROPTERA. 
Coreus rugator, Fabr. Syst. Rhynch. p. 192. 4°. 
Oriterus destructor, Hahn, Wanz. Ins. i. p. 8, f. 27. 
Coreus ordinatus, Say, Journ. Acad. Nat. Sci. Philad. iv. p. 318. 2°; Compl. Writ. ii. p. 244, 2. 
Coreus tristis, Jaeger, Life N. Am. Ins. p. 115, t. iv. f. 20. 
Gonocerus rugator, Burm. Handb. ii. 1, p. 311. 4%. 
. Gonocerus tristis, Dall. List Hem. ii. p. 499. 17°. 
Coreus (Gonocerus) tristis, Packard, Guide to Study Ins. p. 545. f. 549. 
Anasa tristis, Stal, Hem. Fabr. i. p. 56.3; En. Hem. i. p. 189. 1°; Uhler, Hayden’s Surv. Mont. 
pt. iv. Zool. & Bot. p. 4017; Bull. U.S. Geol. & Geog. Surv. ii. p. 292. 1°; ib. i. p. 406°; 
Proc. Bost. Soc. Nat. Hist. xix. p. 385 °°; Cook, Inj. Ins. Michigan, p. 12; Riley, 2nd Report 
1869, p. 31 &c.; Town. Glov. Ill. Ins. Ord. Hem. p. 22. 
Hab. Norta America! 2346710 Texas 6, East Florida®, Colorado %, California §, 
Arizona §,—Mexico’®; BritisH Honpuras®. 5 
I include this species in the Central-American fauna on the authority of Dallas 5 and 
Uhler?®, The last author also gives the name of L. Provancher as a recorder of this 
insect near Quebec, and likewise states that it is found in Brazil. I have, however, 
seen no specimens from that region, nor have I been able to find any other reference to 
the same. Ubhler’” remarks that southern and western individuals occasionally exhibit 
a wonderful degree of variability in the shape of the pronotum, and that “specimens 
occur which have the lateral margins of that part either distinctly sinuated, with the 
-humeri quite prominent, or the reverse, with the sides bowed and the humeri broadly 
rounded.” This would almost appear to apply to the characters relied upon by Stal for 
the separation of the following species, A. whleri. The same author critically and well 
remarks on the variation of the “size of the punctures of the surface in conformity with 
its own dimensions—those which are largest being most coarsely punctured, while those 
which are smallest are the most finely punctured.” I have myself observed this in the 
Cydnine. 
This is the destructive insect known throughout the United States as the “‘ Squash- 
bug,” owing to its depredations on the squash-vines. It is for these qualities that its 
habits have been studied; and we know as much of its life-history and economy as we 
do at present of any other American Heteropteron. According to Glover the eggs are 
“said to be round, flattened on sides, and of a metallic brown colour, deposited in little 
patches, fastened with a gummy substance to the underside of the leaves of squashes 
and other Cucurbitacee, in June, July, &c., until late autumn. These eggs are not all 
deposited at one time on the plants, but in successive broods, during the whole season. 
The larve, pup, and perfect insects all indiscriminately attack the leaves and cause 
them to wither up by sucking out the sap, and appear to poison the foliage. They 
moult their skins several times before attaining the perfect or winged state, and become 
more oval in form as they grow older ; and as successive broods throughout the summer 
they do much injury to squash- and pumpkin-vines. These insects sometimes collect in 
