OF WASHINGTON, VOLUME XVIII, 1916 109 



describes this genus and species, detailing characters which he 

 considers distinguish it from the closely allied genera Cytt'irrhina, 

 Milesia, Spilomyia, and Temnostoma. Pulcher and sorosis must 

 be referred to Caliprobola, since they agree in all generic charac- 

 ters except that they possess small spines on the lower margin of 

 the hind femora; the absence of these spines or bristle-; Verrall 

 claims to be an essential character for the typical European 

 species. Verrall states that the subgenus which Williston 

 used in his table is not the true Caliprobola, as it has bristles 

 present on the hind femora. But even C. speciosn has "tiny 

 bristles beneath the hind femora," as is stated by Yerrall him- 

 self in his description of this species. The material before me 

 tends to show that this is a specific rather than a generic char- 

 acter. C. aldrichi, new species, has the spines very minute, in 

 this respect agreeing closely with C. speciosa. A character 

 seemingly of more importance is the brilliant bronze aeneous color 

 of the abdomen which is similar to our Chrysochlamys croesus 

 O.S., and even more so to CaU/c.'m aenea Fabr. of Europe. At 

 the present time the catalogues list only two species under this 

 genus; speciosa from Europe and cimbiciformis Portsch, from 

 Siberia. Sack has described a species C.aurea from Transcaspia 

 (Beil. Progr. Gymn. Wohler, vol. 42, p. 28, 1910). 

 Brachijpalpus and Caliprobola may be distinguished as follows: 



Head noticeably triangular shaped, face entirely dark, abdomen dark, 

 thorax with longitudinal vittae, hind femora with 1 short bristles 

 behnv Brachiii)nli>nx 



Head not not iceably triangular shaped, face largely yellow, abdomen 

 bright aeneous with opaque cross bands; thorax without vittae, 2 

 hind femora with .short bristles beneath, sometimes very small 



< '<i!i pruhola. 



TABLE OF SPECIES. 



1. Dorsum of thorax dull black, with nearly all black pile; female without 



opaque cross bands on fourth abdominal segment :i 2 



Dorsum of thorax brassy aeneous, with pile all yellow; female wit h 

 opaque cross band on fourth abdominal segment 4 



2. A deep infuscation on anterior border of wing which extends into the 



first and second basal cells; anterior cross-vein joins the middle of 

 discal cell; firsl abdominal segment entirely aeneous except for an 

 opaque spot on anterior margin 3 



/ In Williston's table, the true nnifli</i>ul />ns are said not <<> have short 



bristles below. 



-With proper reflection two median ones are scarcely perceptible on 

 individual specimens. 



3 One 9 specimen of pulcher has a faint band. 



