TRANSACTIONS 



OF THE 



AMERICAN ENTOMOLOGICAL SOCIETY. 



VOLUIVtE XXXIV. 



niPTKROLOCilCAT NOTES.— I. 



MICROPEZIDJ^. 



(Plates I-II.) 

 BY E. T. CRESSOy JR. 



This paper is the result of a sho/c study of the material in the 

 collection of the Academy of Natural Sciences of Philadelphia, 

 which is mostly neotropicv.], and includes some species that have 

 been but little noted heretofoie. I have taken the liberty of rede- 

 scribing those of which, to 'ny knowledge, only the brief original 

 description exists, and hav^ therefore given many additional charac- 

 ters of specific value. 



The male genitalia iiolds very good characters, and I have there- 

 fore given a few fig'ires sliowing their variations. The ovipositor of 

 the female, ment'oned in the following descriptions, unless otherwise 

 designated, refer only to the first section, not to the retractile portion. 



Ostei- Sacken, in his " Diptera from the Philippine Islands" 

 (Berl. Eut. Zeit., xxvi, p. 194, 1882), describes the chtietotaxy of the 

 Micropezidse, which I will give for tliose species treated herein. Of 

 the thorax there are two priescutellars, two supra-alars, — one of 

 which may be called the postalar, — two notopleurals, two scutellars, 

 with tiie following exceptions : Calobata nehulosa Lw. has another 

 bristle before the prsescutellars ; C. annu/ata Fab. and the genus 

 Micropeza have no praescutellars. The pleurae of the genera Calo- 

 bata and Cardiacephala have no distinct bristles, but there are one 

 or inore series of long hair-like bristles on the posterior portion of 

 the hypopleurse. In the genus Micropeza, on the other hand, there 

 is a strong sternopleural bristle, with several minute ones below it, 



TKANS. AM. ENT. SOC. XXXIV. (1) .TANUAKY, 1908. 



