522 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



vex, upper nearly straight (fig. 12, c). Lower margin of palms tuber- 

 culate. Fingers widely gaping to tlie tips in tlie male, very slightly 

 gai>ing in the female. 



DimcmUms. — Male : Length, .'{4 mm. ; width, 56.2 mm. ; width of front, 

 lower margin, 1.18 mm. Female: Length, .i? mm.; width, G1.2 ram.; 

 width of front, lower margin, 14.3 mm. 



IHstribtition. — This species was received from the Mexican commis- 

 sion of the World's ('olumbian P^xposition, 18!);3. The types are from 

 Oolima, Mexico; one large male and two large females (No. 18G32, U. S. 

 N. M.). There are also one male and three females from Huetamo, State 

 of Michoacan. 



PSEUDOTHELPHUSA SULCIFRONS, new species. 



Allied to r. dilatata, but front higher, orbits oval^ cervical suture 

 straight avid more transverse, merus ofmawilliped shorter. 

 Carapace wider than in dilatata, smooth ; cervical suture straighter 

 and more transverse, deep; median suture very 

 deep, continued to the lower margin of the front. 

 Front (fig. 13, a) of about even depth throughout 

 its width; lower margin an even curve, inter- 

 rupted at the middle; upi)er margin obscurely 

 tuberculate. Outline of orbit like that of P. 

 xantusi. Abdominal appendage of the first 

 segment in the male (fig. 13, e,f) with the outer 

 laminate process well developed, its outer mar- 

 gin irregularly dentate, posterior tooth the 

 largest, denticulate, and separated by a broad 

 sinus from the following teeth. The lobe on the 

 inner side of the appendage is broader and its 

 basal tooth larger than in /'. dilatata. Palm of 

 cheliped (fig. 13, c) with its lower margin more 

 convex than in dilatata ; the palm is widest at a little distance from the 

 base of the dactylus, while in dilatata the widest part is at the base of 

 the dactylus. The ])ollex is shorter than in dilatata. Surface of fingers 

 and lower surface of i)alm covered with squamiform granules. 



Dimensions — Male: Length, 22.8mm.; width, .39.5 mm.; widthoffront, 

 lower margin, 1>.8 mm. 



Type.— One specimen only, a male (No. 19482, U.S.N.M.), was col- 

 lected at Valalag, Oaxaca, Mexico, July 4, 1894, by K. W. Nelson and 

 E. A. Goldman while making biological explorations for the TJ. S. Depart- 

 ment of Agriculture. It was found in a spring on the mountain side 

 at about 3,500 feet elevation. 



PSEUDOTHELPHUSA GARMANI, new species. 



Superior margin of front leeled; carapace depressed, granulate ; exog- 

 nath of nmxilUpeds reduced to a stump; hand with a tubercle at base of 

 fingers ; front low. 



"^r^ 



Kid. 13.— PSEUDOTHKLPHUSA 



SULCIFHONS, MALE. a. FUONT-, 

 X %. h. MAXIM-IPED, X IJ. 

 C. LAKIlKIt (UlELA, X ^. (/. Ah- 



uoMEN, ,\J. e. Left AiiiiOMi- 



NAL AI'l'ENDAdE, INNKK VIEW, 



x:i. /. Same, loweuvikw, .\;i. 



