8058 Insects. 



In the case of P. ratisbonensis alone a doubt may still exist, as 

 none of the French collections possessed that insect previously to my 

 visit, but I have M. Aube's authority for supposing the species which 

 we found in such abundance last year to be identical with the T. ratis- 

 bonensis of Gillraeister. 



The following is a list of the British Ptinellae, with the diagnostic 

 characters of each species. I have thought it best to retain the species, 

 as they are separated in the new edition of Schaum's ' Catalogue,' 

 noting those which I suspect will prove to be the sexes of other 

 species. 



Species Ptinellanim inter se distinguuntur signis his propriis, 

 videlicet. 



1. P. ratisbonensis, Gillra. L. c. tV — -r? ^i"- Magnitudine ma- 

 jori, capite rotundato, et abdoraine obtuso. 



2. P. Maria, n. s. L. c. vix. ^^g lin. Tota forma lata, ac praeser- 



tim pronoto rotundato, pedibusque longis, gracillimis. 



3. P. hritannica, Matth. L. c. -^ lin. Toto corpore rugose-punc- 

 tato, capite oblongo, basi latiori pronoti, atque membris robustis. 



4. P. denticollis, Fairm. L. c. -^ lin- Forma convexa, obovata ; 



capite lato ; capite et pronoto Isevioribus, angnlis posticis pro- 

 noti acutis, fere productis ; elytris brevioribus, apicibus valde 

 rotundatis, atque abdomine obtuso-conico. 



5. P. punctipennis, Fairm. L. c. tV ^i"- Haud a P. denticolle 



differt, nisi colore fusco-piceo, alis amplis, elytrorumque apicibus 

 validissime rotundatis. Sexum alterum ejusdem speciei credo.* 



6. P. tenella, Erichs. L. c. vix. -^ lin. Forma elongata lineari ; 



pronoto parvo ; elytris praelongis, apicibus miuime rotundatis; 

 et abdomine acuto-conico. 



7. P. aptera, Guerin. L. c. ^^lin. Forma, brevi, ovata, depressa; 

 latitudine et lateribus ovalibus pronoti. 



8. P. testacea, Heer, [liinbata. Heer). L. c. ,% lin. An alter sexus 



prsecedentis : alis amplis, atque oculis nigris prominentibus tan- 

 tum differt. 



* Only two examples of this insect have been found, viz., the original specimen in 

 M. Fairmaire's collection, and one in the collection of Mr. Janson. With the circum- 

 stances of the capture of M. Fairmaire's specimen I am not acquainted, but at the 

 same season of the year, and in the same part of the country in which the latter speci- 

 men occurred, Mr. Janson also met with the true P. denticollis. 



