Vol. xxiv] ENTOMOLOGICAL NEWS 



Undersides of both sexes, the same as the upper side, but the orange 

 band is duller, approaching yellow in color. Antennae, head, thorax, 

 abdomen, and legs, black. 



That the species is variable is shown by Fig. 3, where the orange, 

 tooth-like projection does not pass quite to the base. 



Habitat. Neiva, U. S. Colombia. 



Types. Collection Mengel. 



The species is close to C. splendent Grose-Smith, and may 

 be the same, but the tooth of the orange band is very short 

 in comparison with the species under discussion. 



Descriptions of two new Species of the Dipterous 



Genera Chaetopsis and Stenomyia, with 



notes on other species. 



By E. T. CRESSON, JR., Academy of Natural Sciences of 



Philadelphia. 



In working over some material for determination, two 

 new species of Stenomyia were found and notes made of 

 some species of Chaetopsis which may prove of interest to 

 my colleagues. 



The table given by Mr. C. W. Johnson, in his "Insects of 

 Florida," (i) of the species of the genus Chaetopsis is very 

 good and, I understand, is based upon natural specimens, not 

 upon descriptions. However, the characters given for the sepa- 

 ration of C. aenea and fuhnfrons are somewhat inconstant, but 

 if used with propriety will prove quite satisfactory. I have, 

 however, found that the females are quite constant in their 

 differently shaped sixth abdominal segments which I here fig- 

 ure in outline. I also give my idea of the most important 

 characters for the separation of these species as well as of 

 their synonymy. 



The species herein treated may be separated as follows : 



I. Front with distinct series of converging bristles which are much 

 stronger than the proclinate orbital hairs ; apical angle of anal cell 

 prolonged ; face but little retreating with epistoma somewhat prom- 

 inent. (Chaetopsis) 2 



(i) Bull. Am. Mus. Nat. Hist., xxxii, 83, 1913. 



