BIBLIOGRAPHICAL NOTES ON THE HEMIPTERA. 307 



He regrets very much that Guerin has not yet (1832) published 

 the text, so that he could have established certain synonymy 

 more satisfactorily than is possible from figures, which, although 

 very carefully made, leave something to be desired for such a 

 purpose. I cannot see my way, therefore, to quoting an earlier 

 date than 1838 for the Hemiptera of the ' Coquille.' 



(7) In my "Nomenclature of the Genera " ('Entomologist,' 

 1903, p. 214), I included the new genera in Burmeister's work 

 cited here, under date of 1838, that being the date on the title- 

 page, the date given by Hagen, and the date usually accepted by 

 homopterists. 



Unfortunately this is another case of incorrect title-page, and 

 I now set forth all I can trace in the matter, in the hope that 

 further information may come to light. 



(a) The work was issued at irregular intervals, in parts, 

 unpaged, undated, and with the genera unnumbered. I do not 

 know if covers were issued, and, if so, whether these were 

 dated. 



(b) The original title was " Genera Insectorum. Iconibus 

 illustravit et descripsit Hermannus Burmeister .... volumen I, 

 Ehynchota : Berolini . . . Burmeister et Stange, 1838," the pre- 

 face being dated October, 1837. 



(c) In 1846, after ten parts were issued, the title was altered 



to " Genera qusedam Insectorum " " Berolini, sumtibus 



A. Burmeister, 1838-1846." 



(d) As mentioned in (a), the parts are neither dated nor 

 paged, nor are the genera numbered. There is, however, an 

 " Index generum descriptorum," dated from Halle, July, 1846, 

 in which the genera are numbered and arranged according to 

 their supposed affinities, not according to date of publication. 



(e) The contents of each part are as follows (principally 

 according to the ' Bericht der Entomologie ') : — 



Heft 1, 1837 : (?) Lystra (no. 20). [Ed. 2, 1840-6.] 



„ 2, 1838: Selenocephalus (no. 12), Ccelidia (no. 15), Eu- 



pelix (no. 6), Jassus (no. 14). 

 ,, 3,1838: Ulopa (no. 3), Dorydium (no. 5), Cephalehis 



(no. 4), Ledra (no. 9). 

 „ 4, 1838 : Gypona (no. 16), Xerophloea (no. 8). [Also 



Phthirius and Pedicidus.] 

 „ 5, 1840: Paropia (no. 7). 

 „ 6 or 7, 1841 : Typhlocyba (no. 13). 

 „ 8, 1845 : Fulgora (no. 18). [With subgenus Pyrops, 



no. 19 in Index.] 



(/) The Lystra notes are referred to in Spinola's Monograph 

 of the Fulgorid^ (1839), so that they are probably included in 

 the first part. The ' Bericht der Entomologie ' commences in 

 Wiegmann's Archiv for 1838, and it is there mentioned that 



2 c2 



