174 
50. — Tapinoma melanocephala. 
Lasius melanocephalus, Fab., Syst., Piez., 417. 
A few specimens in a house at Lahaina, Maui. 
The only locality from which this species has been 
recorded is Cayenne. 
5 1 . — PPwENOLEPIS longicornis. 
Formica longicornis, Latr., Hist. Nat. d. Fourm. 113. 
Honolulu. 
A widely distributed species ; found in Europe in hot- 
houses. 
52. — Prenolepis obscura, Mayr. 
Prenolepis obscura, Mayr, Yerh. zool. — hot. Ges. Wien., 
1862, 698; Formicidae der Novara Keise, 52, pi ii. fig. 15 
and 15'** 
Smith records this species as Prenolepis clandestina, 
Mayr, but it is, I believe, P. obscura ; for I cannot 
find any trace of pubescence on the mesonotum. Mr. 
Blackburn has taken the male which has not been 
described. It is dark brown; the antennae are 
testaceous, the scape a little darker than the flagellum ; 
the mouth, base of the legs and tarsi, pale yellowish — 
testaceous, the femora and tarsi fuscous, pale beneath. 
Head and thorax shining, finely shagreened, and 
bearing some longish (comparatively) blackish hairs. 
Abdomen shining, impunctate, the apical half bear- 
ing longish black hairs. Wings brownish-yellow, 
but not deeply, the nervures paUid testaceous. The 
apex of the abdomen is pale yeUow. The only 
specimen I have appears to be somewhat immature. 
The species has only been recorded from Australia. 
PONEBIDAE. 
53. — PONERA CONTRACTA. 
Formica contracta, Latr., Hist. Nat. Fourm. 195, t. 7, f. 40. 
Rare in Oahu. A widely distributed species over the 
world. 
