52 Bulletin Wisconsin Natural History Society. [Vol. 6, Nos. 1 — 2. 
late. First abdominal segment twice as long" as wide at tip, the 
spiracular protuberances unusually large ; lateral carinae distinct, but 
no trace of any median ones. Second segment as long as the first and 
Komewhat longer than wide at tip, the gastrocoeli unusually large and 
deep ; first and segment except the tip of the latter rugulose ; fol- 
lowing segments smooth and polished. Legs slender, four anterior 
ones yellow, their coxse black basally and their femora with a short 
black stripe inwardly at the base. Posterior coxae black, their tips and 
the trochanters yellow ; femora pale ferruginous, with a black stripe 
inwardly at the base ; tibiae and tarsi pale ferruginous, the tibial spurs 
weak, only one-third the leng-th of the metatarsus. Wings hyaline, 
stigma piceous with pale spot at base ; veins piceous. Areolet open, 
indicated as a regular pentagon ; transverse median vein in hind wing 
broken at the middle. Entire face, anterior orbits, mandibles except 
tips, palpi, underside of antennae, lower part of cheeks, cuneiform 
marks on mesonotum, tegulae, spot in front and below, large spot on 
mesopleura on anterior margin below, and line on posterior margin 
above, and bands on second to fourth abdominal segments more or less 
emarginate posteriorly^ pale yellow. 
Male. Differs by its more elongate form, 25-jointed antennae and 
interrupted band on second abdominal segment. Length 6 mm. 
Described from four specimens sent me by Mr. G. A. Rohmer 
of the University of Colorado, who collected them on flowers of 
Ribes vaUicola at Florissant, Colo., June ii, 1907. 
Zootrephes similis sp. nov. 
Female. Length 5 mm. Black ; abdomen, except base and apex, 
and legs ferruginous. Head three times as wide as thick, shining, 
the face finely punctate. Front and vertex polished, occiput and 
cheeks finely punctured ; clypeus smooth and shining, its anterior edge 
subemarg-inate. Upper tooth of mandibles deeply divided. Eyes bare, 
separated on the front by a distance equal to their length. Antennae 
black, 22-jointed; basal joint of flagellum one-half longer than the 
second ; following- growing- shorter, those near the middle twice as 
long as thick. Pro and mesonotum finely punctulate, shining; no 
trace of parapsidal furrows. Depression at base of scutellum shallow, 
polished. Metathorax completely areolated, the carinae very strong. 
Pleurae shining, almost smooth. Abdomen subopaque, more shining 
