THE CANADIAN ENTOMOLOGIST. 425 



THREE NEW SPECIES OF TRYPETID^ FROM 



COLORADO.* 



BY F. L. THOMAS, AMHERST, MASS. 



While working upon the Trypetidae of New England, I had 

 the opportunity of examining much western material. In that 

 loaned by Mr. Charles W. Johnson, Curator of the Boston Society 

 of Natural History, there were three specimens from Colorado, 

 which are described below as new species. The types are located 

 in Mr. Johnson's private collections. 



Eutreta simplex, n, sp. 



Type — One female from Colorado. 



Brown; face without black spots. Wings broad, reticulate, 

 with a white crescent seaming the tip. Scutellum with four 

 bristles. Posterior basal cross-vein obtusely angled ; small cross- vein 

 two-thirds along the discal cell; third vein with bristles on the 

 under surface of the wing. Length 9 6.5 mm., wing 5 mm. 



Head — Front pale brown, slightly tapering, and about one- 

 third the width of the head. Three lower frontals; the second 

 pair of upper frontals, the 

 post- vertical and outer ver- 

 tical bristles white; cilia of 

 the posterior orbit consist- 

 ing of coarse white and 

 fine black bristles. Epi- 

 cephalon (that portion 

 above the neck) yellow 

 and dark brown, the re- n* aa-E^ .fa*fa. *ii* 



mainder of the cephalon lighter brown. Eyes large, oval, with no 



traces of any transverse stripes. Cheeks narrow with brown 



bristles. Oral margin projecting and slightly arcuate. Face pale 



yellow without black spots, hollowed. Antennae yellowish brown, 



reaching nearly to the oral margin; third segment with distinct 



but not a sharp anterior corner; second segment with a distinct 



pale spine. Arista with black bristle and brown base. 



Thorax — Brown; blackish on the notum, metanotum, and 



sternopleurae. Short hair whitish: bristles dark brown. First pair 



"■Contribution from the Entomological Laboratory of the Massachusetts 

 Agricultural College. 

 December, 1914 



