THE MVIflAI'ODA OF NORTH AMKKIOA. 75 



tlistiiutly.l or \ lootlird, Kiisi mw ..f st-ah's on i»osttMior scjiiinMits 

 romiM)srd of « or H nvtw tippiMl sraU's, wliirli pro.jt'rt iK'yoml iMndt-r of 

 s«'j;iiients. V«Mitral platr <»f niiitli pair of lr;is not i>ro(ln<r«l as in ncr- 

 rains, fo|>ulatioii foot very similar. lAMi;;tli of ImkIv, 1"» to l.s.r>'""'; 

 wi.ltli I'.L' to L».S""". 



Ila}f}t>it.—\:\\\W Uork, Arkadrlpliia, OkoNtna, MminTslMno, an<l 

 ritiina Tluilc. 



As ainady indicatrd. tliis spt'cu's is closrly irlatctl to srrnttii.s. It 

 is priiM'ipally s^'paiatrd l»y its snialh'r size and form of tlu- vontral i)lato 

 of ninth pair of lei^s of malt*. 



This sperit's may only rrpresiMit a ;i«'o;iraphiral form of srrratun. It 

 is very iiiMindaiit thron-liout the State, and all thosr roll«'«t«'d dniiny; 

 the snmmrr wen' in the larva sta^res. I am indebted t(» Mr. lliit<lier- 

 s«in for adult spe<'imens. 



15. Fontaria virginiensis (Drnry). 



Abundant at Donaldson, eommon at Okolona. 



Specimens from Arkansas are similar to tho.si' from North Carolina, 

 but those from northern parts of Mi.ssi.ssippi valley represent <ieo;iraj>h- 

 ieal species. 



At Donaldson the adults were found crawlin<i- on the surface of the 

 j,nound in company with a lar^e numb«'r of their younji. probably one 

 adult to .1(K) or vSOO youn;;-, then (July 11. ISST) about half jjrowii. 



This species seems ^(» be more coidiiied to river bottoms and low 

 rich woodlands. 



The odor of i)rnssi(; aeid is strongly emitted by this species throuj;h 

 a series «>f pores on each side <»f tin- body. 



16. Spliaeriodesinus pudicus. sp. ii()v. 



(ireiieral ccdor pinkish, es])e<-ially posteriorly, anterior half of sej;- 

 nients darkest, a black median dorsal line, antenuib dark, legs ])ale. 

 IJody widest and highest anteriorly, tai>ering posteriorly, smooth, seta* 

 absent. Vertex .smooth, somewhat suleate. Antenna' subclavate, 

 about i'qualing width of body. Dorsal plates suiooth, four preced- 

 ing the last with an indistinct row of obtu-se s( iles; lat<'ral i)lates, ex- 

 cept the first, antei)enult and penult with their posterior margin serrate. 

 Anal jtlate triangular with the angles rounded, sparsely pilo.se. Legs 

 long and slender, extending be\ond sides of body. Male: Ventral plate 

 of second pair of legs produced into two short cones; coxa^ of second 

 and third pairs more ]>ilose than others: copulation foot much twisted, 

 end expanded and d'vided, pilose. Length of body 7"""; width 2""". 



Habitat. — Little Rock and Okohma. 



This is the first time that any si)ecies of this genus has been found 

 in the L'nited States. It is easily distinguished from *S'. mtxicanus 

 (Saus.sure), by having a few .scales on i)osterior dorsal plates. 



The collection contains two specimens of this species. 



