TflOrODS OK NORTH AMERICA. 



267 



times sliortcr uiul :i little narrower than (lie outer Wraiieli. and is lami- 

 nar in shape; the outiM* hrancli is sickle-shaped, rather acute, and 

 litrhtlv flexuous. 



Fir,„ 278. — Irona nana (After Schicedte and Meinert). <i, Adult female, b. Voting male. 

 r, Young of the second stage, d, Ungula of the le(; of tuk third pair of sa.me. (All 

 enlarged.) 



Length, 8-18 mm. 



Color 3^ellow, with large or small dark, branching spots, arranged 

 in transverse series, scattered over the middle of the body; the eyes 

 are black. '^ 



«The above description is adapted from the following one of Schicedte and Meinert' s: 



Subovata vel producte obovata, valde contorta, convexiuHcnla, pluH sesqui vel 

 duplo longior quani latior (5 : 3 vel 2:1). 



Caput parvnm, subtrigonum vel subconicum, qnani annulus qnartns trunci ter 

 vt'l quarter angustius (3:1 vel 4:1), multo latins (juani longius (5 : 4), ])rofunde 

 inimersnni, fronte declivi, breviter rotundata. Oculi magni, suV^pentagoni. Antenna^ 

 primi paris compressiusculse, crassiuscuke, late distantes, angulum prioreuL annuli 

 primi trunci articulo quinto attingentea, antennas secundi paris vix complentes; 

 8-articulat9e. 



Antenme secundi paris su})(ilifornies, quam antenn;o primi paris (hi])lo teuuiores 

 angulum priorem annuli primi tranoi articulo sexto fere attingentes; 9-articulatce. 

 ]\Iarg() anticus annuli priuii trunci latissime sinuatus, angulis promiuulis, rotundate 

 angustatis, obtusiusculis; latera annuli non constricta, late rotundata. 



Anguli postici aunulorum prioruui trunci latissime rotundati, ])osteri()rum subro- 

 tundati. 



Epimera in a^iuum fere porrecta; terna priora longiuscula, angustiuscula, i)ost 

 breviter rotundata; terna posteriora breviuscula vel brevia, latiuscula vel lata, per 

 jiaria sensim latitudine crescentia, post truncata vel rotundate truncata. Kpimera 

 terna j)riora angulum annuli spatio majore vel minore, per paria seJisim longitiidine 

 decrescente, non attingentia; terna {xjsteriora angulum annuli fere explentia. I'edes 

 breviusculi, per ])aria sensim lougitudine cresceutes; j)ariuui trium priorum con- 

 junctim valde divergentes; pariunujuattuor i>()steriorum conjunctiui vix convergentes, 

 in latere altero incurvi. Ungula' lougiuscuhe vel longte, crassiuscula; vel crassa?, 



