466 
ZOOLOGICAL LITEIiATUHE. 
Delaware ; I. Ihnbifrons, 1. c. p. 182, I. exiguus, ibid., and I. inmlutuSy 1. c. p. 
183, Colorado Territory. 
§ 12. Scutellum yellow or red ; abdomen red, or red and black, apex white or 
yellow : — I. terminalisy l.c. p. 184, and I. soror, 1. c. p. 185, Delaware ] 1. veloxy 
ibid., Dlinois. 
Ischnus. Cresson describes 12 new North American species of this 
genus: namely, Ischnus Je/mms, 1. c. p. 186, Illinois, Miissach. j I. suhlatus, 
ibid., Illinois, Virg. j I. proximus, 1. c. p. 187, I. hluudii, 1. c. p. 188, and I, 
vinuulus, 1. c. p. 189, Pennsylvania ; 1. wilsoni, 1. c. p. 188, Virginia j I. con- 
tiyuuSy 1. c. p. 190, Maryland j I. W-albuniy 1. c. p. 191, Eastern States ; /. 
volenSy 1. c. p. 192, Virginia, Illinois; I. scituius, 1. c. p. 193, and I. alhitarsis, 
1. c. p. 194, Illinois ; and L iridescenSy 1. c. p. 193, Delaware. 
Tryphon. Cresson (/. c. pp. 272-281) describes 16 new North American 
species of this genus, namely : — 
§ 1. Scutellum and abdomen black : — 
Tryphon pedalisy l.c. p. 273, and T. carinatus, ibid., Illinois; T. ? limatusy 
1. c. p. 274, Delaware. 
§ 2. Scutellum pale ; abdomen black, margins of segments pale : — 
T. ? submar ginatusy 1. c. p. 274, Illinois ; T. pleuralis, 1. c. p. 275, New 
Jersey. 
§ 3. Scutellum pale ; abdomen yellow and black ; — 
T. ? trifasciatusy 1. c. p. 276, Pennsylvania. 
§ 4. Scutellum black ; abdomen red, or red and black, or black and 
yellow : — 
T. americanuSy 1. c. p. 276, Delaware, Canada ; T. affinisy 1. c. p. 277, Penn- 
sylvania, New Jersey ; T. seminigery 1. c. p. 278, T. semirufusy ibid., T. fes- 
tivuSy l.c. p.-279, T. tibialisy l.c. p. 280, T. rufocinctusy ibid., T. minimuSy 
1. c. p. 281, from Illinois ; T. analisy 1. c. p. 279, and 2\ capitatuSy 1. c. p. 281, 
Pennsylvania. 
Cteniscus. Cresson (/. c. pp. 282-284) describes five new North American 
species : Ctenisciis mediatuSy 1. c. p. 282, and C, dorsalisy ibid., Dlinois ; C. or- 
bitalis, 1. c. p. 283, Pennsylvania ; C. jiamcoxcey ibid., and C. clavatusy 1. c. 
p. 284, Delaware. 
Exochus. Of this genus Cresson (1. c. p. 285-287) describes seven new 
North American species : Exochus apicalisy 1. c. p. 285, E. pygmceusy ibid., E. 
pleuralisy 1. c. p. 286, and E. pallipesy 1. c. p. 287, from Illinois ; E, fulvipeSy 
1. c. p. 285, Pennsylvania ; E. locvisy 1. c. p. 286, California and Dlinois, and 
E. doi'salisy ibid.. New Jersey. 
Mesoleptus. Of this genus Cresson describes 30 new species from different 
parts of North America (7 c. pp. 257-272) : 
§ 1. Scutellum and abdomen black, margins of segments sometimes pale : — 
Mesoleptus ‘hiajovy 1. c. p. 257, Delaware; M. annulipeSy ibid., from Canada; 
M. ? validusy 1. c. p. 258, and M, compressus, 1. c. p. 260, Pennsylvania ; M. 
tihiatovy 1. c. p. 259, New Jersey, Dlinois ; M. dubitutusy 1. c. p. 259, and M. 
obliteratus, 1. c. p. 260, Dlinois. 
§ 2. Scutellum black ; abdomen red, or red and black : — 
lU. ohscurusy 1. c. p. 261, M, argentifronSy ibid., M. conjunctus, l.c. p. 262, 
