28 



poison introduced is probably accidental, and contains the ordinary 

 putrefactive germs which may adhere to its proboscis. Dr. Davidson's 

 treatment was corrosive sublimate — 1 to 500 or 1 to 1,000 locally applied 

 to the wound, keeping the necrotic part bathed in the solution. The 

 results have in all cases been favorable. Uhler gives the distribution 

 of E. biguttatus as Arizona, Texas, Panama, Para, Cuba, Louisiana, 

 West Virginia, and California. After a careful study of the material 

 in the United States National Museum, Mr. Heidemann has decided 

 that the specimens of Easahus from the southeastern part of the coun- 

 try are in reality Say's E. biguttatus, while those from the Southwestern 

 States belong to a distinct species answering more fully (with slight 

 exceptions) to the description of Stal's Easahus thoracicus. The writer 

 has recently received a large series of E. thoracicus from Mr. H. Brown, of 



Tucson, Ariz., and 

 had a disagreeable 

 experience with the 

 same species in April, 

 1898, at San Jose 

 de Guaymas, in the 

 State of So nor a, 

 Mexico. 



Perhaps the best 

 known of all the 

 species mentioned in 

 our list is the blood- 

 sucking cone-nose 

 (Conorhinus sangui- 

 suga) (figs. 22 and 

 23). This ferocious 

 insect belongs to a 

 genus which has sev- 

 eral representatives 

 in the United States, 

 all, however, con- 

 fined to the South 

 or West. C. rubro- 

 fasciatus and C. variegatus, as well as C. sanguisuga, are given 

 the general geographical distribution of "Southern States." C. dimi- 

 cliatus and C. maculipennis are Mexican forms, while C. gerstwcl-eri 

 occurs in the Western States. The more recently described species, 

 G. protractus, Uhl., has been taken at Los Angeles, Cal., Dragoon, 

 Ariz., and Salt Lake City, Utah. All of these insects are bloodsuckers 

 and do not hesitate to attack mammals. LeConte, in his original 

 description of C. sanguisuga (Proc. Acad. Nat. Sci. Phil., Vol. VII, p. 

 404, 1854-55), adds a most significant paragraph, which, as it has not 

 been quoted of late, will be especially appropriate here: "This insect, 

 equally with the former (see above), intlicts a most painful wound. It 



Fig. 22.— C ■ nvrldnus sanguisuga: a, first pupal stage; b, second 

 pupal stage: c, adult bug; d, same, lateral view— all enlarged to 

 same scale (from Marlatt). 



