^°1889"'] PROCEEDINGS OF THE NATIONAL MUSEUM. 593 



Vrocteidce. In 1884 Simon discovered that his 3[iUia was identical with Hentz's genus Prodidomus 

 and that consequently the name Aliltia had to bo dropped for Hentz's name. I, therefore, change the 

 name of the family in accordance wltli the type genus into rrodidomidce. 



12. ni(i?i.(Zi&Mta<a.— Keyserling erroneously took mandibulata for the male of piisilla, while tlio real 

 male of this species is a different form ; therefore mandibulata remains a good species, especially as 

 the female has been collected in Tennessee. 



13. Although Eraerton admits that the eyes of his two species are all of the same size ho brings 

 them under a genus which is distinguished bi' the minute anterior middle eyes. These two species arc, 

 therefore, not Pholcomma at all, but I have to let them stay here provisionally as I have had no oppor- 

 tunity to study them. 



14. Erigone. — By following Keyserling in not recognizing Monge's, Emerton's, and Simon's breaking 

 up of the genus Erigone into many smaller genera and, therefore, reuniting the species again under the 

 one genus Eriqone. I was compelled to change the homonymous names of some of Emerton's species as 

 follows: Cornicularia minuta^ Erigone paidlula ; Lophocarenuin jiallidum — Erigone pallens ; Tme- 

 ticus pallidus=Erigo7le pallescens ; Tmeficus montanus = Erigone collina ; Tmeticus tibialis = Erigone 

 monticola .- Tmt ticus brunnexts = Erigone fiisca. 



15. Acrosoma gracile. — In regard to the use of Walckenaer's specific names made for Abbot's illus- 

 trations my views correspond with those of Dr. McCook as expressed in the Proceedings of the 

 Academy of Xatural Sciences, Philadelphia, pp. 1 and 428, 1888. 



16. Acrosoma aculcatum. — C. Koch gives the patria oi Acr. acidcatuma.nd crassispinum as "Amerika." 

 The Germans generally understand by "Amerika" Xorth America, and as the two species are 

 closely related to gracile and sagittatum I have included them in this catalogue, but have given them 

 a sei arate place. 



17. foliata Hentz.— ^alckenaer used the -a^mafoliata iov Ep. cornuta ; for Hentz's name I proposed 

 folifera. 



18. globosa Keyserling. — Keyserling described this Spider as globosa first in 1865. Emerton is wrong 

 in substituting McCook's name triaranea, 1876. 



19. jnncMZata Key.serling. — This Spider, though related, is not identical with Ep. gibberosa, as Em- 

 erton erroneously asserts. 



20. obesa Hentz.— This variety seems to me to belong rather to marmorea {insularis, Hentz) than 

 to trifolium, as the coloration of the legs, especially that of femur IV indicates. 



21. septima Hentz. — Amongst a lot of J?pcrra caraJica Keyserling which I received from Tennessee 

 I found a few specimens which reseraljle most exactly the description and illustration of Hentz's 

 septima. As Hentz records this Spider from North Carolina and Alabama, where cavatica is quite 

 common, there is no doubt that it is a variety of cavatica and not of trifolium as Emerton as.serts. 



22. 6i/!<rca, McCook. — This is clearly no Cyrtophora. In this genus the lateral eyes are disjoined 

 for a distance nearly equal to their diameter, which is not the case with bi/urca. 



23. Cyolosa conica. — The Spider which Emerton described under this name is, according to Keyser- 

 ling in litt., not conica Pallas, but caudata Hentz, turbinata Walck. I have, however, in my collection 

 the true conica Pallas, from San Diego, Cal. 



24. Thcridiosoma Cambr. — Dr. McCook was certainly right to place his Epeira 7-adiosa in the family 

 Epeiridiv. Not only do the structural characters, the position of the eyes near the chjpexis, the form 

 of the maxilla-, etc., but the biological fact, tirst discovered by I hat naturalist, that this Spider constructs 

 an orb web, of which the spiral threads are viscid, all warrant such placing. As radiosa is, however, 

 a Theridiosoma, according to Thorell and Keyserling, we have to drop Emerton's new genus Micro- 

 epeira (a barbaric name by the way) and transfer the genus Theridiosoma to the Orbitclariw, fam. 

 Epeiridce. 



25. Tetragnathidce.—KejsevVm<i in Die Arachn. A ustnaliens, No. 36, p. 218, has given us a splendid 

 subdivision of the large genus Tetragnatha according to the following key: 



, < Space betw. LE not greater than that betw. AME and P'HE. ..Tetragjiatha 

 } Space betw. LE greater 2 



, i Spinnerets terminal Eugnatha 



\ Abdomen extending beyond spinnerets Eucta 



26. Thomisus. This is not the genus Thomisun of our modern authorities as Tboiell, Keyserling, 

 Simon, etc., but the old Walckenaerean genus, which compiised once nearly all the genera of this fam- 

 ily. I have collected all species under this name which Iiave not yet been re-arranged, giving to these 

 the proper synonyms which I could collect in the present literature. 



27. inquisitor Thorell.— As this name is preoccupied by Walckenaer, I have substituted for it Tho- 

 rellii. 



28. obscurus Keyserling. This species name is also preoccupied by Blackwall, and had to be changed 

 into Keyserlingii. 



Proc. N. I\r. 89 .38 



