276 CALIFORNIA ACADEMY OF SCIENCES  [Proc. 4TH Serr. 
Myrmica (Monomorium) pellucida F. Smith, Catalog. 
Hymen. Brit. Mus. 6, 1858, p. 124 &. 
Formica familiaris F. Smith, Journ. Proc. Linn. Soc. Zool. 
4, 1860, Suppl. p. 96 8. 
Tapinoma melanocephalum Mayr, Verh. zool. bot. Ges. 
Wien. 12, 1862, p. 651. 
Two worker specimens, one from the east side of Inde- 
fatigable Island, the other from Hood Island (F. X. Williams). 
This species is also recorded by Emery as having been taken 
on the boat at Chatham Island by Dr. G. Baur. Like the two 
species of Tetramorium, Tapinoma melanocephalum has been 
disseminated throughout the neotropical region from its orig- 
inal home in the Indomalayan region and has become a pest 
about houses and shops. 
Subfamily CAMPONOTIN/E. 
15. Prenolepis (Nylanderia) longicornis (Latreille) 
Formica longicornis Latreille, Hist. Nat. Fourmis. 1802, p. 
ULSI teh 
Formica vagans Jerdon, Madras Journ. Litt. Sc. 17, 1851, 
By JUZAS 
Formica (Tapinoma) gracilescens Nylander, Ann. Sc. Nat. 
Zool (A) ax Le5Ou p73 o) 
Tapimoma gracilescens F. Smith, Catalog. Hymen. Brit. 
Mus. 6, 1858, p. 56. 
Prenolepis gracilescens Mayr, Verh. zool. bot. Ges. Wien, 
12, 1862, p. 698. 
Prenolepis longicornis Roger, Verz. d. Formicid. 1863, p. 
10. 
Five workers from Cormorant Bay, Charles Island (F. X. 
Williams). This species is of Indomalayan origin like Tapi- 
noma melanocephalum and has also become a household pest 
throughout the tropics and even in some cities in temperate 
regions. It is known to nest on ships and has brought its Old 
World myrmecophiles, a beetle, Coluocera madere, and a 
cricket, Myrmecophila prenolepidis, to America. Both of these 
insects were recently taken by Dr. W. M. Mann on the island 
of Haiti in nests of P. longicornis. 
