192 



INSECTS OF SAMOA. 



lelei, collected in iii, iv, v, vi, vii, ix, xii (various collectors). Savaii : Safune 

 and Salailua, iv and v.1924 (Bryan). Tutuila : Pago Pago, ix and xii. There 

 is also one from Tonga (Vavau, Neiafu), 5. iii. 1925 (Hopkins). 



2. Asarcina ericetorum Fabr. var. oceanica Bezzi. 



Bezzi {Dipt. Brachycera and Athericem of the Fiji Islands, p. 71, 1928) 

 describes only the One can infer that, since the hair on the frons is black, 

 the ground colour is also black. This is the case with all of the present series. 

 The scutellum is mainly black-haired. 



Savaii : Salailua, 4 16-24.V.1924. Tutuila : Pago Pago, 1 ^, 2 

 12-16.iv.l924 (Bryan), and 23.ix.1923 (Swezey and Wilder). Upolu : Apia, 

 1 5.iv.24 (Armstrong) ; Vailima, 1 8.vi.l924. 



3. Syrphus corollae Fabr. var. vitiensis Bezzi. 



In some cases a small spot continues the yellow thoracic stripe to the 

 scutellar margin. The colour of the abdominal bands is more brownish-orange 

 than yellow. 



Tutuila : Fagasa, 4 1 9.ix.l923 (Swezey and Wilder). Upolu : 

 Apia, Aleipata, I ^,2 iv. and v.1924, 1925 (Buxton and Hopkins). Savaii : 

 Safune, lowlands to 1,000 feet, 1 1. v.1924 (Bryan). There is also one $ 

 from Tonga, Vavau (Haloga), 23.ii.1925 (Hopkins). 



4. Ischiodon scutellaris Fabr. (Text-fig. 1). 



Three five The males agree quite well with typical specimens. 

 Bezzi {ojp, cit. p. 73) states that the anterior eye facets are not enlarged in this 

 species, but in the males from Samoa, the facets are very distinctly enlarged in 

 the region to the side and just above the base of the antennae. Brunetti 

 {Fauna of British India, vol. 3, p. 97, 1923) likewise finds the anterior facets 

 enlarged. The anterior tarsi are not blackened at the tips but reddish in colour. 

 In two of the three males the genitalia, though strongly developed and visible 

 above, are shining black, but in the third they are reddish. The spine on the 

 trochanters is stout. The five females vary considerably. The dark area of 

 the scutellum is much deeper and more distinct, and the abdominal bands on 



