AMERICAN APTERA. 65 



(liibioiia pucifioa nov. sp. — Lengtli 8 mm. ; oeph. 3 iimi. long; 2.1 mm. 

 wide; i>:itell:i i)liis tihii iv. 3 mm. Cephalothorax hrownisli yellow; darkest 

 near eye-margin ; mandibles reddish brown; sternum, legs and paljii yellowish ; 

 last joints of palpi and tips of tarsi blackish; abdomen gray or reddisli, with a 

 media!! basal b!-ow!) stripe reaching almost to the n!iddle of dorsi!m ; the a. u!. e. 

 about their dia!i!eter ai>art. and about the same distance fro!i! tlie larger a. s. e. ; 

 p. m. e. two and one-half tin!es their dia!neter apa!-t. about twice their diameter 

 from the smaller p. s. e. ; the a. s. e. a little lai-ger tha!i p. !n. e. ; mandibles large 

 and slightly p()r!-ect ; sternum nar!-ow, truncate at base ; foui-th i)air of legs much 

 the lo!igest, all with scattered black spines, two or th!-ee beneath on tibia iii: 

 thei'e is a patch of blackish haii-s on the undei-side of the tips of metata!-si iii and 

 iv; the epigynum has a large middle lobe, cou cave behind, each side there is a 

 round cavity separated by a clavate se])tui!i. 



Sevei-iil speeinieiis, Olympia, Wash. (Trevor Kincaid). 



PliriirolitliiiM afiinis nov. sp.— Lei!gth % 2.2 mm. Cephalothorax yel- 

 low-browi!, streaked witJ! black ; legs yellowisli, blackish on bases of anterior 

 femora; sternum pale, with blackish edges; abdo!neu black, with an indistinct 

 pale curved spot each side before the middle, a still less distinct pair at base; 

 structure very similar to P. pugnntns, but the eyes of posterior row are farther 

 separated, the p. m. e. being about two-thirds their diameter ajjait (less than half 

 in P. pu(inutus) ; sternum very broad and triangular; the palpi are similar to P. 

 piignatus, but Uu'ger; the outer process of the tibia is slightly outcurved near its 

 tip ; the pi'ojection to the femur is near the base. 



One male, Ft. Collins, Colorado (Mr. Baker). It can hardly be 

 a western variety of P. pugn,att(>^, as I have typical specimens of the 

 latter from Washington. 



AposteiiiiN <'iii('ti|»e!$ nov. sp.— Length 4. mm. Cephalothora.x yellowish, 

 eyes surrounded by black ; a i-eddish stripe each side, starting quite narrow, but 

 becoming !nuch broader near dorsal gi-oove; a black i!i[arginal lii!e ; ma!!dil)les, 

 legs and .steri!ui!i pale yellowish ; red bands at !niddle and tip of fe!nui-, o!i pa- 

 tella, and at bases and tips of tibia a!!d !netatai-sus ; abdo!uen pale, suffused with 

 reddish above and so!ne white spots, a disti!ict basal red spear-!i!ark, faintly con- 

 nected to some ai)ical red chevrons ; venter yellowish ; cejjhalothorax somewhat 

 similar to ,4i(r(BCrt, head quite distinct. Abdo!nen oval, broadest a little behind 

 the middle; sternu!n quite broad, poi!ited behind; lip much bi-oader than long; 

 foui-th legs longest. the!i first: all with stout spi!!es, those u!!der tibiie and meta- 

 tarsi i ai!d ii being very stout and long, a!id arisi!ig fi-om slight projections; two 

 rows of five each under tibia, two rows of three each under n!etatarsus: uj)per 

 row of eyes slightly recurved, equally la!-ge, and very !nuch Ia!-ger than lower 

 eyes: the p. m. e. closer to s. e. than each other; the a. m. e. smaller than a. s. e. ; 

 clyp/?us very low; the epigynum shows two anteriorly divergi!ig i-oddish i-idges, 

 the i!arrow furrow between theiu hiss an opening behind, each side is a yellowish 

 elliptical patch. 



One specimen, Olympia, Wash. (Trevor Kincaid). This genns is 

 related to Plinifolithi(.'^, bnt the eyes of the posterior row are much 

 larger, and the row slightly recurved ; the a. m. e. are smaller than 

 the a. s. e. 



TRANS. AM. KNT. SOC. XXIII. (9) MARCH, 1896. 



