232 Transactions. — Zoology. 



Genus 3. Gatocha (Hoi.). 



Tlie upper branch of the fork foriiis a single smooth curve. 

 Male aotennaj 16-jointed, verticillate, joints pedicelled ; female 

 antennae 10-jointed, pilose. 



Genus 4. Lestreniia. 



Second longitudinal vein joining the margin much before 

 the apex of the wing ; third longitudinal with a very long 

 fork. 



Genus 5. Gecidogona. 



Antennae 2 + 9 jointed ; joints verticillate, with very 

 short pedicels. Second longitudinal reaching margin close to 

 apex ; branches of third longitudinal very long, almost par- 

 allel to one another. 



The number of genera and sub-genera at present repre- 

 sented by specimens in my collection is comparatively small, 

 but I have no doubt that many vacant spaces will before long 

 be filled^ up. Tlie entire classification of species at present 

 known is given above, so that little difficulty will be expe- 

 rienced in classifying species that may be discovered sub- 

 sequently. In the descriptions given below I have only 

 mentioned those various divisions that are represented by 

 species in my collection. I have not yet discovered any 

 species of Gecidomjjia. Gampylomijza, on the other hand, is 

 represented by several species. 



Sub-family I. CECIDOMYINA. 



Wings with not more than four longitudinal veins, the two 

 last frequently combining in the middle of their course, 

 forming a more or less distinct fork. No ocelli. First tarsal 

 joint much shortened. 



Genus 2. Miastoe, Meinert. 



Eyes separated in both sexes by a broad forehead. Antennse 

 2 + 11 jointed; the basal joints cupuliform ; the flagellar 

 joints in the male ovate, with short pedicels and long ver- 

 ticillate hairs; in the female moniliform, subsessile, with 

 short verticils. Prothorax arched. Legs slender in the 

 male, shorter in the female ; the tarsal joints of unequal 

 length. Wings almost bare, appearing granulate under a 

 high power. Three longitudinal veins ; cross-vein some- 

 times present. 



Miastor agncolcB. Plate V., fig. 1. 



Antennae, 0-026 ; expanse of wing, 0-033 x 0-013 ; length 

 of body, 0030in. Antennae nearly black, nearly as long as the 

 body, oval, becoming nearly globose towai'ds the tip ; last joint 

 elliptical ; verticils moderately long. Thorax nearly black, 



