March, 1901] 



PSYCHE. 



173 



The males of minimus, as well as the 

 closely related species, minkii, oculatus, 

 and sylvestris, have the valve relatively 

 small and the plates long, so that the 

 latter project beyond the valve a dis- 

 tance equal to once or twice the length 

 of the valve. Melsheimerii, on the other 

 hand, is readily separated from the 

 preceding by its proportionately large 

 valve and very short plates. The latter 

 do not project beyond the valve to a 

 distance more than one third or one half 

 the length of the valve. See the accom- 

 panying figure (C) . 



I must conclude then that Deltocepha- 

 lits melsheimerii is distinct from D. mini- 

 mus ; that the references to D. melshei- 

 merii in " Hemiptera of Colorado" were 

 correct ; and that D. affinis G&B is a 

 synonym of D. melsheimerii. 



Chlorotetti.x unicolor Fitch. — This 

 species was described from a single fe- 

 male, to which Dr. Fitch gave the num- 

 ber 767. The type is still in a good state 



of preservation except that it is consid- 

 erably faded in color. 



Mr. Baker in his article on Chlorotetti.\ 

 referred to above reports upon an exam- 

 ination of what he supposes to be a 

 Fitch type in the National Museum and 

 says it is the species described by Mr. 

 Van Duzee as C. galbinata. This being 

 correct, the specimens reported in 

 " Hemiptera of Colorado " as C. unicolor 

 must be wrong. I compared the type of 

 unicolor with C. galbinata Van D., and 

 with the Colorado specimens of C. unico- 

 lor and found Mr. Van Duzee's deter- 

 minations to be correct and his galbinata 

 very distinct from the type of unicolor. 

 The descriptions of both these species 

 as given by Mr. Van Duzee in Psyche 

 of August, 1892, pp. 308-31 1 are correct 

 and will enable any one conversant with 

 the gross anatomy of these insects to 

 correctly separate the species without so 

 much as a hand lens to aid him, unless 

 his eyesight is very poor. 



INSECTS AND SPIDERS OF THE GALAPAGOS ISLANDS. 



BY VERNON L. KELLOGG, STANFORD UNIVERSITY, CAL. 



By the financial aid of Mr. Timothy 

 Hopkins of Menlo Park, California, 

 Stanford University was enabled to 

 send two zoologists with Captain Noyes 

 of the ninety-six ton schooner Julia E. 

 Whalen (San Francisco) to the Galapa- 

 gos Islands in November, 1898. Mr. 

 Robert Evans Snodgrass, assistant in 

 entomology, and Mr. Edmund Heller, 



student in zoology, were selected to 

 make the trip. They reached the 

 Archipelago on December 22, 1898, 

 and remained in it until June 23, 1899. 

 In the time of their stay they visited 

 every island of the group except the 

 small island called Jervis, spending 

 from two to sixty days on each island. 

 Some of the larger islands were visited 



