NORTH AMERICAN APTERA. •^'*«' 



pubescence, the scutellum posteviovly and l'-^--"^^;.^";;'^^]^ ^:f,;;*^\v;".', 

 hnght fulvous pubescence; enclosure of metanotum reticulated at base W:. 

 fnsco-byaline; nervures, stigma and tegula. dull testaceous ^eg '>la k ap al 

 joints of tarsi ferruginous. Abdomen finely ^^^^^ened and feel^y punctu e^^ 

 apical margins of segments narrowly pale testaceous, with th>n fasua^ of pale 

 Dubescence, anal fimbria fuscous. Length 8 mm. 



r-Kes mbles the female, the pubescence a little paler ; the clypeus yello. 

 wiU-'a tSngular black spot on each side; basal process of labrun, subquadrate, 

 shorter than broad. Length 5—7 mm. 



Hah -Florida; twenty-six female, eight male specimens, ihis 

 .specie, closely resembles A. flavo-dypeata Sn)., but may be distm- 

 guishe.l by its darker wings, fulvous pubescence, etc. 



The Phalaugida Mecostetlii of the United States. 



BY NATHAN BANKS. 



The Mecostethi (Laniatores) have two claws to each of tlie four 

 posterior tarsi, or else a compound claw; the Plagiostethi (Palpa- 

 tores) have one simple claw to the tarsus of each leg. i wo families 

 of the Mecostethi have been recorded from the United States in the 

 following literature : 



Sav.-An Account of the Arachnids of the United States. Journ. Acad. Nat. Sci. 



1821 ; Complete Writings, LeConte. , r< ^ 



Tellkampf-Beschr. ein neu i. d. Mammuth-Hole in Kentucky aufgefund. Gat- 



tung. V. Gliederthieren, Arch. f. Naturgesch. 1844. 

 Cope.- On the Wyandotte Cave and its fauna. Am. Nat. 1872. 

 Simon.-Opiliones Mecostethi, Ann. Soc.Eut.Belg.l8<9. 

 Hibard.-Two days' collecting in the Mammoth Cave, etc., Am. Ent. 1880. 

 Packavd.-New Cave Ai^achnida, Am. Nat. 1884. 

 Packar.l.-The Cave Fauna of North America, etc., Nat. Acad. Sc. 188, (.) 



The two families may be separated as follows : 



Hind pair of cc. free at apex, spiracles o!^---;-;-/^^^^^^^°?5^^- 

 Hind cox^ wholly united to the venter, spiracles distinct COSMETID^. 



Our species of Cosmetida. apparently belong to one genus, which 

 has some of the characters of Cynorta, and some of Unoue. As 

 Cynorta is the older and best known, I adopt that name for them. 

 The eve-tubercle is almost obliterated, with only a few small gran- 

 ules, the eyes widely separated, the legs short and tarsus I .nth hve 

 ioints The palpi have the second joint short, concave wi hin ; the 

 third still shorter, widest at tip; the fourth longer than the others, 

 with the sides flattened; the fifth short, with a long claw, fhe 

 palpi are usually appressed to the foce, so as to cover the mandibles. 

 The three species known to me are separable as follows: 



JUNE, 1893. 

 TRAKS. AM. ENT. SOC. XX. 



