152 Linnaan Society. 



1. Myrmica rubra = Formica rubra, L. ; M, scabrinodis, Nyl., var. 



2. M. Icevinodis, Nyl, 



3. M. vagans = Formica vagans, Fabr.; M. ruginodis, Nyl, 



4. M. LONGiscAPUs, Curt., a new species which resembles M. Icevi' 

 nodis, but the males are much smaller, the antennae are much longer, 

 and instead of the scape being only as long as the two basal joints of 

 the flagellum (as in M. lcevi?iodis and M. rubra), it is equal in length 

 to the eight following joints. Other differences are also pointed 

 out and figured. The species was first found in Perthshire, and 

 Mr. Curtis has since received specimens collected in the neighbour- 

 hood of Manchester by Mr. R. Wood. 



5. M. PERELEGANS, Curt., another new species, of which the male, 

 female, and neuter are figured, and of which a detailed description is 

 also given. It was found by Mr. Curtis near Bournemouth in Hamp- 

 shire, in July 1850, and seems to approach the Formica subter7'anea 

 of Latreille, but the neuter has the upper surface of the head black, 

 and the first nodule has not a long petiole, as described and repre- 

 sented in all Latreille's figures ; the male has not very pale yellow 

 legs ; nor the female a brown, very shining thorax, with a brown 

 petiole. It may be related to F. acervorum, Fabr., but that species is 

 described as having the back of the thorax black. 



6. M. acervorum = F. acervorum, Fabr. ; M. lacteipennis, Zett. 



7. M. DENTicoRNis, Curt., found by Mr. Curtis in Scotland in 

 July 1825, and no doubt allied to M. lobicornis, Nyl., but having the 

 tooth in the knee at the base of the scape in the neuter much less 

 developed, and other differences in the rugosity and striation of the 

 head, thorax and nodules. Of this species the male and neuter are 

 also figured. 



8. M. caspitum = F. csespitum, L.; M. fuscula, Nyl. ; M. impura, 

 Fcerst. var. ; and M. modesta, Fcerst. ? 



9. M. luberum = F. tuberum, Fabr. ; F. tuberosa, Latr. 



10. M. simillima, Nyl. MSS. 



11. M. graminicola = F. graminicola, Latr. 



12. M. unifasciata = F. unifasciata, Latr, 



13. M. domestica, Shuck. 



Under the genus Stenamma, Westw., Mr. Curtis enumerates two 

 species : — 



14. St, Westwoodii, Steph., of the male of which he gives a de- 

 scription, together with a figure of the wing. 



15. St. albipennis. Curt., a new species discovered by himself 

 near Dover in July 1852, which is described in detail. 



The genus Myrmecina, Curt., is limited to a single species : — 



16. M. Latreillii, Curt., of which the male and female are de- 

 scribed at length, and the latter figured, with details of the several 

 parts. 



In conclusion Mr. Curtis expunges from the list of British insects 

 Formica pubescens, Latr., and F. emarginata, Oliv., admitted on 

 doubtful authority ; and F. cognata, Steph., which is not to be 

 found in Mr. Stephens's cabinet, now in the British Museum. 



