bS INSECUTOR INSCITI^ MENSTRUUS 



second joint only about twice as long as wide. Three outer or 

 lower proclinate fronto-orbitals in female, two inner or upper 

 reclinate. Postvertical bristles as long and strong as ocellars. 

 Palpi long, curved, slender, very gradually thickening toward 

 tip, distinctly longer than front metatarsi. Parafacials rather 

 wider than the deep facial depression (equals facial plate plus 

 facialia), the facialia on edge and not widened or flattened. 

 About three irregular rows of macrochaetse on parafacials. 

 Four strong sternopleurals and four postsuturals. Apical 

 scutellar pair of bristles little longer than the discal pair. Hind 

 crossvein not so close to bend, no wrinkle at latter. 



Dolichogonia aurea, new species. 



Length of body, 10 mm. ; of wing, 8 mm. One female, 

 Oroya, Peru, over 12,000 feet, March 7, 1913 (Townsend). 



Black, golden on upper parts. Head silvery pollinose, para- 

 frontals deep golden. Frontalia black, broad, equilateral. 

 First two antennal joints rufous, palpi light rufous. Three 

 golden vittse on mesoscutum, also lateral vitta along edge 

 golden, the golden humeri confluent with latter, and isolated 

 golden spot on mesopleura ; four broad black vittae, equal and 

 reaching scutellum ; latter testaceous on disk, golden pollinose. 

 Abdomen thickly and densely golden pollinose on tergum, leav- 

 ing a faint median black vitta and black spots on origins of 

 macrochsetae ; anal segment black, with four large golden spots 

 on front half which are confluent on extreme base of segment. 

 Venter black, faint silvery bloom showing, with flecks of golden 

 along incisures. Hind tibiae dark rufous, front femora silvery 

 on outside. Wings nearly clear, deep yellow on base. Tegulae 

 nearly white, margined with yellow. 



Holotype, No. 19418, U. S. Nat. Mus. TD4118. 



Chaetocraniopsis, new genus. 



Genotype, Chcetocraniopsis tchilensis Townsend, new species. 



Allied to ChcBtocrania, from which it differs by the less 

 prominent front, less swollen head, narrower parafrontals and 

 parafacials, arista shorter and thickened evenly to tip. The 

 apical cell ends unusually far before wing-tip, the fourth vein 

 is bent at a right angle, its last section strongly bent in. The 



