508 
ZOOLOGICAL LITERATURE. 
and Mochtherus (Loew) ; joint 3 of antennce very long, compressed. Type 
A. himantocerus (Wiedem.). 
Allocotosia, g. n., Schiner, /. c. p. 845. Allied to Ommatius ; thorax less 
robust ; epistome nearly plane ; joint 3 of antennae very long, slender, conical j 
arista short, rather closely pectinated. Type O. auratus (Fab.). 
JSmphysomera, g. n., Schiner, 1. c. p. 845. Allied to Ommatkis ] epistome 
quite flat j abdomen strongly clavato; posterior femora much thiclconod; wings 
not dilated at anterior margin. Type O. conopsoides (Wiedem.). 
JEcthodopa, g. n., H. Loew, Berl. ent. Zeits. 1866, p. 16. Allied to Dioctria ; 
lowest third of face convex, with a dense mystax j posterior femora and all 
the tibiae with short but strong setae. Sp. pudera, sp. n., Loew, /. c. p. 15, 
Nebraska. 
PyyostoluSj g. n., II. Loew, /. c. p. 16. {Dastypogonince.) Anterior tibiae 
spurred; abdomen depressed, wider towards apex in cf ; face broad, not 
tuberculate ; thorax gibbous legs stout, posterior tibiae clavate, posterior 
tarsi thick ; wings long, all the posterior cells open. (Schiner, Verb, zool.- 
bot. Ges. in Wien, xvi. p. 846, says that he cannot distinguish this genus from 
Brachyrhopola.) Sp. P. argentifer, sp. n., Loew, 1. c. p. 16, and P. pietus, 
Loew, I, c. p. 17, Columbia ; P. diveSj Loew, 1. c. p. 17, California. 
DiogmiteSj g. n., II. Loew, 1. c. p. 21. Allied to Saropogon ; 4th posterior 
cell closed ; head broader and more disciform ; abdomen and legs much 
longer and more slender. Spp. nn. D, platypterus (p. 20), discolor (p.21), ter- 
natus, misellus (p. 22), angustipennis (p. 23), %imhrinus (p. 24), United States ; 
D. hypomelas (p. 24), New Mexico; I), hilineatiis (p. 23), Cuba (with D. 
ternatus). 
ScleropogoHy g. n., H. Loew, 1. c. p. 26. Allied to Stenopogon ; face and 
forehead narrower ; joint 3 of antennae shorter and with a longer style ; 1st 
posterior cell closed before margin of wing, 3rd very much dilated. Sp. S. 
picticornisy sp. n., Loew, 1. c. p. 26, from California. 
Ospriocet'usy g. n., fl. Loew, 1. c. p. 29. Allied to Stenopogon ; joint 3 of 
antennae longer, style obsolete ; 4th posterior cell closed before margin of 
wing. Sp. Basypogon spathidatum (Bell.) = D. ceacus (Wiedem.) ; Osprio- 
cerus ceacideSy sp. n., Loew, /. c. p. 29, from California; and O. rhadamanthuSy 
Loew, ibid., from New Mexico. 
IMzoniaSy g. n., II. Loew, 1. c. p. 30. Allied to Stenopogon ; wings black ; 
abdomen with 2 white bands on segments 2 & 3 ; joint 3 of antennae very 
long, slender, naked above, apical style obtuse, obsolete ; abdomen cylin- 
drical; 1st posterior cell narrowed towards apex, 3rd very broad, 4th closed 
before margin of wing. Sp. Basypogon quadrimaculatus (Bell.) ; Bizonias 
phcenicurusy sp. n., Loew, 1. c. p. 29, Tamaulipas ; B. hicinctuSy Loew, 1. c. 
p. 30, New Mexico. 
Sphageusy g. n., II. Loew, 1. c. p. 32. Allied to Baihypogon ; face convex, 
not tuberculate ; joint 3 of antennae much longer, style obsolete; 3rd poste- 
rior cell less dilated, closed at the margin ; anterior femora with strong spines. 
Sp. S. chalcoproetuSy sp. n., Loew, 1. c. p. 31, Cuba. 
Bicolonusy g. n., H. Loew, I, c. p. 32. Allied to Zaphria ; head small ; 
facial tubercle and anterior margin of forehead convex; joint 3 of antennae 
sublinear, as long as the other two, terminal style short, very thick and ob- 
tuse ; posterior cells open, 1st narrowed, 3rd not dilated towards apex ; ante- 
rior tibiae not calcarate. Sp. B. simpleXy sp. n., Loew, /. e. p. 32, California. 
