REPORT OF THE STATE ENTOMOLOGIST I907 309 
provided with several whorls of setae. The genitalia are also of a 
different type. 
Nothing is known concerning the life history of American forms. 
Kieffer states that the larvae of the European C. muscicola 
Kieff. occur on mosses. It is probable that these forms are sylvan 
as in the case of Lestremia and allied genera. 
Key to species 
a Length 4 mm; antennae binodose .......... americana n. sp., C. 929 
aa Length 1.5 mm; antennae not binodose....... SIOSVOMAS wy, Go, Cy Gen 
Fig. 29 Catocha americana n.sp., 6th antennal segment of male, much en- 
larged. (Original) 
MICROCERATA n. ¢. 
This genus has been erected to include several forms remarkable 
because of the greatly reduced male antennae. These organs are 
composed of but 8 to 9g short segments, the second being greatly 
enlarged and in general appearance much resembling those of the 
Campylomyzine genus Micromyia. The genitalia also differ 
from those of Lestremia. The female, which we have provisionally 
associated with the above mentioned male, has very small antennae 
composed of 10 short joints, the second being somewhat enlarged, 
