186 INSECUTOR INSCITIit MENSTRUUS 



(male unknown). No ocellar bristles. First two abdominal segments 

 sometimes with no macrochaetae whatever, not even at sides, but usually 

 a median marginal pair on second and a very short lateral marginal on 

 both first and second. Long heavy spines on outside of middle tibiae. 

 Cheeks of femeJe about three-fifths of eye-height, front at vertex about 

 one and one-half times eye-width, parafacials nearly or quite as wide as 

 clypeus. 



Reproductive habit, probably leaf-larviposition of colored maggots. 



T5T>e, Pseudoarch^tas marmorata, new species. 



This genus bears a strong resemblance, both superficially and in most 

 external characters, to the Cnephalia group, but is readily distinguished 

 therefrom by the absence of ocellar bristles, while the reproductive char- 

 acters show that it is allied to Archytas. 



Pseudoarchytas marmorata, new species. 



Length of body, 1 2 to 13 mm. ; of wing, 9.5 to 1 mm. Four fe- 

 males, Chosica, 2,700 to 3,000 feet, two on flowers of Baccharis sp., 

 January 20, 1913; two on flowers of Mikania sp.. May 8 and 9, 1913. 



The general coloring of this species is almost the same as that of Pele- 

 teria marmorata, the only differences being that the thorax is a little more 

 noticeably silvery pollinose, leaving the vittae more distinct ; the wings are 

 slightly less infuscate, being practically subhyaline ; the parafrontals and 

 head in general are rather more lightly colored, the parafrontals being 

 quite thickly golden pollinose ; and the parafacial and cheek pile is golden 

 as well as the occipital. The palpi are fulvous to rufous. The scutellum 

 is rather noticeably reddish except base. The basocostal area of wings 

 is smoky-yellowish. 



Type, TD4226 (fly, uterus, colored maggots). The uterus seems to 

 be straplike, but was dissected out in a dried state, unfavorable to posi- 

 tive diagnosis. The chzuracters of the cephalopharyngeal skeleton of the 

 first-stage maggot indicate relationship with Archytas rather than with 

 the Pyrrhosiinae. 



Archytas andicola, new species. 



Length of body, 9.5 to 10.5 mm.; of wing, 7.5 to 8.5 mm. Three 

 males and two females, Chosica, about 2,700 feet. May 8 and 9, 1913, 

 on flowers of Mikania sp. ; one female, Verrugas Canyon, about 5,400 

 feet, June 25, 1913. 



Clypeus silvery-white, cheeks with faint brassy bloom extending on 



