- Please keep these annotations SPOILER-FREE by not revealing information from later pages in the novel.
136/143 "Mierda. Mierda. Mierda."
Shit. Shit. Shit.
136/143 Randolph Scott
Stage & screen actor who played in many Westerns in the 1930s, 40s and 50s.
137/144 . . .ready to come in a flying machine
Reference to the popular song "Come Josephine, In My Flying Machine (Up She Goes!)" words by Alfred Bryan, music by Fred Fisher. Wikipedia, Lyrics. Clearly irresistible to Pynchon, in addition to the double entendre on "come."
138/142 The Feast of San' Ercole dei Rinoceronti
The Feast of Saint Hercules of the Rhinoceros, a reference to the Central and South American Hercules beetle, Dynastes hercules, in the subfamily Dynastinae (rhinoceros beetles). 
Italian for semen, insulting or ironically affectionate name, like a**hole. WordReference.com
148/156 George Raft
Screen actor and pop icon from the 1930s. Dapper dresser in the period gangster style. Pynchon's description of the padded shoulders seems to fit.
In which Benny Profane, a schlemihl and human yo-yo, gets to an apocheir
The Whole Sick Crew
In which Stencil, a quick-change artist, does eight impersonations
In which Esther gets a nose job
In which Stencil nearly goes West with an alligator
In which Profane returns to street level
She hangs on the western wall
In which Rachel gets her yo-yo back, Roony sings a song, and Stencil calls on Bloody Chiclitz
In which various sets of young people get together
Confessions of Fausto Maijstral
In which things are not so amusing
In which the yo-yo string is revealed as a state of mind
V. in love