120 MR. F. SMITH ON THE GEOOEAPllICAL DTSTRIBUTIO:!! 



important. To the typical genus Myrmica twenty-eight species 

 are added : the cosmopolitan species M. molesta was found at 

 Singapore and Celebes ; it is truly a domestic species, few localities 

 being free from it ; it is conveyed in merchandise to all parts of 

 the globe, and, apparently, propagates equally well in all latitudes. 



Several new genera belonging to the Myrmicidse are added. 

 One of these, Keptacondylus, was founded upon the examination of 

 workers which are remarkable for having only seven joints in the 

 antennae ; subsequent investigations have led me to believe these 

 to be the workers of the genus Myrmecaria of Saunders — a female 

 of the latter genus having been sent with workers of Keptacon- 

 dylus ; the female has the same number of joints in the antennae 

 as the workers, the antennae of the males having thirteen joints. 

 This genus is found at Port Natal, in Borneo, and Java. 



To our knowledge of the geographical distribution of the 

 Cetptocebid^ much information has been added. The typical 

 genus, Cryptocerus, is peculiar to South America, — Brazil having 

 furnished the majority of the species. Of the genus Meranoplus 

 eight species are at present known : three are from Brazil, one 

 from India, and four, discovered by Mr. "Wallace, are from Ma- 

 lacca, Borneo, and Aru : this genus is also found in Australia. 

 Of the genus Cataulacus nine species are known — five having 

 been discovered by Mr. Wallace, found in Malacca, Borneo, Key 

 Island, Waigiou, and Mysol. 



The genus EcJiinopla is placed in the family Cryptoceridae in 

 the papers descriptive of Mr. Wallace's insects ; but it belongs 

 to the Formicidae : Avhen first received, a single example was all 

 the material for examination ; subsequently others have been ob- 

 tained and the true situation of the insect ascertained. Seven 

 species have been discovei'ed ; they are from Malacca, Borneo, 

 Celebes, Singapore, Aru, and Coram. 



The MuTiLLiD^ are of universal occurrence, the typical genus 

 Mutilla as at present constituted being perhaps the most exten- 

 sive in the order Hymenoptera. Thirty-six new species have been 

 discovered by Mr. Wallace. Some species have a wide geogra- 

 phical range ; M. stcspiciosa occurs in Borneo, Celebes, Bachian, 

 Bouru, and Amboyna. Several of the known Indian species were 

 found in Celebes and Borneo. 



One of the most interesting discoveries made by Mr. Wallace, 

 with respect to the geographical distribution of the genera of Hyme- 

 noptera, is his tracing species of the genus Thynnus to the islands 

 Bachian, Gilolo, Ceram, Waigiou, and Mysol,-^Gilolo being the 



