IrtOPODS OF NORTH AMERICA. ■ 231 



duced; those of the seventh seoiiieiit produced. The epiniera almost 

 reach tlie posterior angles of the seo-tnents. 



Terniinal segiiient of abdomen suf)trianonlar or sul)coi'date. Urop- 

 oda much shorter than the terminal abdominal segment; imier branch 

 scarcely shorter than the outcu- l)ianch. Legs long; the first six pairs 

 gi-adually inci-easingly h)nger; those of the seventh pair al)ruptly very 

 much long(M' than the o.thers. The basis of the four posterior paii's 

 furnished with a carina, l^nguhe long, those of the first pair mani- 

 festly shoi-ter than the others; those of the seventh pair manifestly 

 longer than the others." 



OLENCIRA PR/^GUSTATOR (Latrobe). 



(Ml.'^citK jirnr/iistalor 1>atkobe, Trans. Anier. Philos. Sot-., V, 1802, p. 77, \A. i. 

 CymutJioa j>r:v(/uniutor Say, Jour. Acad. Nat. 8ci. Phila. , I, 1818, ])p. 395-;W6. 

 Olenclru lamarku Leach, Diet. Sci. Nat., XII, 1818, p. 351. — Desmarest, Consid. 



Gen. Crust., 1825, p. 807.— Milne Edwards, Hist. Nat. (Vnst., Ill, 1840, 



p. 264. 

 Olencira pvcTgustator ScHicEVTB and Meinert, Naturhistorisk Tidsskrift (3), XIII, 



1881-1883, pp. 152-154, pi. x, figs. 6-9.— Richardson, American Naturalist, 



XXXIV, 1900, p. 221; Proc. U. S. Nat. Mus., XXIII, 1901, pp. 528-529. 



LocaHties. — Potomac River; York Spit, Virginia; Dividing Cove; 

 St. George's Island, Maryland; Fort Monroe, Head of Cockrell Creek, 

 Hampton Creek. Lower Chesapeake Bay; Cape Charles, Virginia; off 

 Gi-eat Wicomico; Pensacola and St. Maiy's River, Florida; Mobile, 

 Ala])ama; Winyah Bay, South Carolina (mouths of menhaden); Zoo- 

 logical Park, ^^'ashington City (on bug-tish); Cristield, Maryland; 

 Florida; Georgetown, District of Columbia. 



Parasite of Brevoortia patronus ; Brevoortia tyrannus ; bug-tish. 



attingentia; paris quarti, quinti, sexti angulum annuli spatio magno, suba^quali, iion 

 attingentia. Pedes parium sex priorum per paria sensim Icnigitudine paulum cres- 

 centes; paris ultimi ceteris manifesto longiores et paulo tenuiores. Ungulie paris 

 primi longiusculic, crassiuscula? ; paris secundi, tertii, quarti, quinti longie vel per- 

 longiP, crassiuscuhe, longitudine subtequales; paris sexti longje vel longiuscuke; 

 crassiuscula^; paris septimi breviusculae, subtenues. 



Cauda ad basin obtecta, longior quam latior plus sesqui (8: 5), quam truncus cum 

 cai)ite multo brevior (4:3). Annuli quinque priores sensim longitudine paulum 

 crescentes. Latera annulorum quinque priorum paulum rotundate dilatata, excavata, 

 vix marginata; annuli primi et secundi oblique truncata; annuli tertii, (luarti, (juinti 

 per jtaria sensim profundius utque magis angulate emarginata. 



Ainiulus analis cordatus, ad basin impressus, obscure carinatus, multo latior cjuam 

 longior (0:5), ceteris annulis caudalibus conjunctis manifesto longior (10:9). Pedes 

 anales annulo anali manifesto longiores (9:8); ramus interior quam exterior valde 

 brevior et vix latior, jjone medium augustatus, sublaniinatus, apicem annuli vix 

 sujierans; ramus exterior angustatus, subfalcatus. 



Long. 21, 5 mm. 



Color ex griseo olivaceus, annulo anali cum pedibus analibus flavicans. — ScHiffiDTE 

 and Meinert, Nat. Tidsskr. (3), XIII, 1881-83, pp. 145-146. 



"See Schicedte and Meinert for characters of genus, Nat. Tidsskr. (3), XIII, 

 18S1-83, pp. 150-151. 



