592 ARANE^ OF NORTH AMERICA MARX. 



The structural characters of this spider, however, are such as to separate it from the existing European 

 genera, and I, therefore, let it stand provisionly as a new genus in the family. 



6. Cliibionidce. — With the same right and for the same reason that the family Agalenidce, Thorell 

 etal., has lately heen divided into Dicfi/nklce Aad Agaleiddce, the fiimi\y Drassidceonjiht to he s-plit. It 

 has been acknowledged long ago that this family contained very heterogeneous elements, which had, 

 however, concentrated themselves into two natural groups, one containing sucli forms as have the iu- 

 feiior spinnerets separated from each other, the masilhe impressed transversely, and which live gen- 

 erally on the ground, under moss and stones, and are more nocturnal in their liahits, while tlie mem- 

 bers of the other groups live generally on plants and trees, their habits are decidedly diurnal, the 

 spinnerets are hero contiguous, and the impressions on the maxilhv are wanting. Simon recognized 

 the value of these characters by giving to each the rank of a subfamily. I go a step further and 

 raise the subfamily to a family. • 



7. Corinna. — U. Koch, in describing (Die Arachniden, ix, p. 18, 1842) the first speciesof the five in his 

 genus Corinjta remarks that the species of this genus can be divided into two natural groups; the 

 first has the anterior middle eyes the largest, and tho four middle eyes stand in a square; the second 

 group contains those in which the anterior middle eyes are not larger than the others, and the four 

 middle eyes stand in a trapez, narrower in front. To the first group belong ruhripes and nigricang, and 

 to the second inemnonia, cincidata, amcena, and tricolor, species from the United States. Should we 

 form from these two groups separate genera, the generic name Corinna would have to be retained for 

 the first group, as it contains the species first described, and this, of course, is the type of the genus if 

 not otherwise stated. Corinna, then, has the anterior middle eyes largest. 



Keyserliug published (Verhandl.d. zool.-botan. Gesellsch. Wieu, 1879, p. 335) a new genus, Cae ianeira, 



closely related to Corinna, and its characteristics are exactly those of Connna in the new definition ; 



that is, the anterior middle eyes are the hirgest. 

 Karsch (Zeitschrift fiir ges. Naturwiss., Liii, p. 373) divides the genus Corinna K. into thofol'.owing 



genera: 



. < Abdomen with a horny basal shield 2 



I Abdomen without a horny basal shield 3 



f Anterior middle eyes largest, mandibles very strong, I legs longest Oorinna'KocH 



I Anterior middle eyes not largest, mandibles small, directed back, iv legs \ongeat. Ihargalia Karsch 



( I legs very much the longest Mandane Karsch 



3 < 



( IV legs the longest -. 4 



f Mandibles and claws extremely long Megalostrata Karsch 



I Mandibles and claws of medium size Corinnoiiima Kaesch 



This later genus is Thorell's Corinna severa (Sludi sui Kagni Males et Paj). 1. Ann. del mus. civ. de 

 Geuova,x,1877,p.481). 



Keyserling, in describing Caitianeir a Mvittala from Massachusetts (Verb. d. z. b. Ges. "Wien, 1887, p. 

 442) asserts that Thargalia is synonymous with Caslianeira. 



Xowthe case stands as follows: Keyserling's first mistake was to form his genus Caxtianeira for 

 Corinna, and his second to assert that Thargalia is synonymous with Castianeira. On the ccmtrary, 

 Caslianeira is a synonym of Corinna, and has to bo diopped, and C. Koch's second group is Thargalia 

 Karsch. This latter genus contains the most common of the United States species. 



Emertou's new genus Oeotrecha (New Eng. Brass., Agal., and Dysderidre, Trans. Conn. Ac, VII, p. 

 4) is nothing more than Karsch'a Thargalia, and has to go, therefore, to the same synonyms. 



8. Catadysas was found by Hentz but once — an undeveloped male — and has since not been found 

 again. We have, therefore, to rely upon the meager description of Hentz. Fortunately, Hentz gavo 

 us a good illustration. Thorell formed a new family for this peculiar genus, the Catadysoida; and 

 assigned it to a place among the Territelarice on account of the vertical movement of the mandibular 

 claws and the insertion of the maxillary pulpi into the tip of the maxillai. Ausserer in his Beiti-. z.k. 

 d. Territel. followed Thorell in this arrangement. As the Territelarice are composed exclusively by 

 tetrap7icumonic species and form thus a natural group of distinct characters, and as Catadgsas possesses 

 only two lamellar trachcie I hold that its proper place is among the Dvpneiimones, and aa Holmberg 

 gives his reasons in Bolot. Acad. Argentin.,IV, p. 153, that Ca(of/)/.^a«is a Draistd, whichseems to me 

 very probable, I havo placed this family near the family Clubionldce. 



9. The statement of Emerton that Tegenaria wedicinalis Hentz is a Caelotes, and a synonym of his 

 Coelotcs mcdicinalis, is merely a lapsus calami. 



10. IlarnataUoa.— This very interesting spider, of -which 1 only possessed two specimens, both females 

 one of which I presented to C ount Keyserling, has been by this author assigned a place in the family 

 Agalenidce. Keyserling himself was in doubt as to the right jjlace for this abnormal si)(»cies, but 

 thought that this family ofl'ered greater aflinities than any other. I think, however, that we ought 

 to form a new family for Uamataliva, the IlaviataKvidce. Unfortunately I havo only ono specimen, 

 and this is not in perfect state. I, therefore, leave it provisionally in its old place. 



11. Prodidomidw.— Thorell proposed anew family in 1875 for the genus lliltia for the reason that 

 the characters of this genus were not in conformity with the fa,nn]y IJnyoidcv to which Simon had 

 assigned it. Thorell gave this family the name MiUioidcv and placed it between the Eugoidiv and 



