177 



fluent with the costa before the apex ; partition nervule of the 

 th.ird cubital cell extending beyond the nervule above it (the 

 cellule oval); six and eiglit nervules in the two gradate series 

 in the anterior wings of the male, and four and five (or six) in 

 those of the female (in the pair before me ;) fifteen to seventeen 

 antepterostigmatic nervules. 



Length of bodv 6 millim ; expanse, male 20 millim., female 22 

 millim. 



One of the smallest species and, in some respects, aberrant, 

 the condition of the subcosta showing analogy with Hypochrysa, 

 and the formation of the apex of the abdomen with Anomalo- 

 chrysa ; but as there are only two series of gradute nervules it 

 cannot be located in the latter genus." 



Bibliography of Hawaiian Chrysopinae. 



1 McLachlan, R. "Neuroptera of the Hawaiian Islands." 



Ann. Nat. Hist. (5) XH, p. 298-303, (1883.) 



2 Blackburn, T. "Notes on Hawaiian Neuroptera, with des- 



criptions of new species." Ann. Nat. Hist. (5) 

 XIV, p 418-421, (1884.) 



3 Perkins, R. C. L. "Neuroptera," h'auna Haw. II, p 47-61, 



(1899.) 



SYRPHIDAE. 



The economic value of the larvae of certain members of this 

 Dipterous family are well known ,their aphidivorous habits mak- 

 ing them of great l)enefit in destroying vast numbers of plant- 

 lice. The larvae of one of the following species of Baccha were 

 found in considerable numl^ers, feeding upon young leaf-hoppers 

 in Queensland. 



BaccJia siphaiiticida, sp. no v. 



Male : face retreating around epistoma, antennal prominence 

 and frontal tubercle moderate but well defined, shining black, 

 with whitish pubescence and greyish hairs on the sides of the 

 frontal tubercle and epistoma ; vertical triangle shining black ; 

 back of head whitish with greyish ciliation ; antennae dull yellow, 

 ?i d joint broadly oval, about as long as deep, arista bare, apically 

 (lark, pale at the base. Thorax and scutellum shining, aeneous, 

 sparsely covered with short dark hairs and very finely punctate ; 

 scutellum fringed with brownish hairs, meso- and sternopleura 

 with sparse testaceous pubescence and 'hairs, golden aeneous. 



