FORMOSAN AGROMYZIDAE. 333 



Crypto chaetum grandicorne Rondani. 



Bull. Soc. Eiit. Ital., 187."., p. 172. 



A single example of this species, Polisha, December. 



PHYTOMYZIXAE. 



Napomyza atrata n. sp. 



Female: Glossy black. Fions opaque, frontal triangle and orbits glossy 

 black; antennae, palpi, and proboscis l)lack, the apex of the latter brownish. 

 Legs brownish-black, shining, tarsi yellowish. Wings slightly brownish, 

 veins deep brown, fourth vein from the cross vein to its apex indistinct. 

 Squamae grayish, fringes brown. Halteres whitish yellow. 



Frons distinctly less than one-third the width of head, orbits narrow, 

 each about one-fourth as wide as center stripe, well differentiated ; 4 pairs 

 of orbitals present, the upper pair- very strong, the others decreasing ra- 

 pidly in size anteriorly, the front pair being reduced to mere hairs, orbits 

 otherwise bare; triangle small, reaching very little beyond the anterior 

 ocellus, Init well defined ; antennae small, third joint rounded ; arista al- 

 most bare, slender, its length etjual to that of frons ; cheek linear, slightly 

 broadened posteriorly, marginal hairs weak, vibrissa slightly differentiated. 

 Mesonotum with '2 pairs of strong dorso-centrals, and generally a weak, 

 anterior pair; discal setulae numerous, about ten rows between the dorso- 

 centrals. Abdomen ovate, surface with short hairs ; ovipositor short, shghtly 

 spatulate at apex, very similar in shape to that of Agromyza jyarvicornis 

 LoEW. Legs of moderate strength ; mid tibiae with 2 very weak posterior 

 setulae, as in most species of Agrontijza. Wing venation as fig 10. 



Length : 3 mm. 



Type : Kosempo, November. 



Male: Similar in coloration to the female, except that the tarsi are 

 paler, and the wings are almost clear. In both the males Ijefore me the 

 size is about 1'75 mm, and there is a yellow central organ to the liypopy- 

 gium,. which is very distinctly protruded. Li one example the venation 

 is similar to that of the female, while in the other the large cross vein is 

 distinctly in front of the small one. 



Allotype: Takao, October 24, 1907. 



Paratype: Tainan, ^lay, 1912. 



This species has much tiie habitus of som(> of the species in the genus 

 Agromyza, especially of the parricornis group, and is very different from the 

 type species of Napomysa, which is slender in build, and resembles thus the 



