32 Dr. E. B rendel' s Synopsis of the genera 



Antennae clavate. 

 CEDIUS, Lee. 

 Maxillary palpi with the third joint transverse, the fourth lunate, 

 convex. 



C. Ziegleri, Lee, 2.7 m. m. long, with three grooves near the base of the thorax, 

 and two small impressions near the middle. Hab. — Mountains, 

 Southern States. Iowa. 

 C. spinosus. Lee., 1.9 m. m. long, with a single transverse sulcus near the base 

 of the thorax. Hab. — Mountains, Southern States. 

 The sexual differences in both species are : % , the eighth joint of 

 the antennae with a tooth-shaped prolongation, and the trispinous an- 

 terior thigh. 



TMESIPHORUS. Lee. 

 Maxillary palpi, second and third joints with setiforrn appendages, 

 the fourth joint triangular, emarginate, appencliculate. 



T. costalis, Lee., 3.3 m. m. long, has the first and second abdominal dorsal seg- 

 ments laterally carinate. Sab. — Atlantic States. 



T. carinatus, Lee., 2. -4 m. m. long, has the abdomen in the middle carinate 

 throughout, and the first and second segment an abbreviated 

 lateral carina. Hab. — Atlantic States. 

 Sexual differences : % , an emargination on the base of the last anten- 



nal joint, which is wanting in 9 • 



CTENISTES, Reichenback. 



The joints of the maxillary palpi with long appendages, the two last 

 joints transverse, ovate. 



Three species much alike in form, differing chiefly in size. 



C. pulverens, Lee, 2.8 m. m. long. The two last joints of the palpi ovate. 



Hab. — California. 

 C. piceus, Lee, 1.9 m. m. long. The two last joints of the palpi oblong. Hab. — ■ 



Northern States. 

 C. Zimermanni, Lee, 1.6 m. m. long. The two last joints of the palpi globular. 



Hab. — Gulf States. 

 The sexual differences consist in the more convex form of the thorax 

 in the 9 an d the very long ultimate antenual joint in the % . 



TYRUS, Aube. 

 Maxillary palpi with the last joint ending in a seta. 

 T. humeralis, Aube, is the only species found in the United States, and has a 

 form resembling a Bryaxis. 1.75 m. m. long. Hab. — Northern 

 States. 



CERCOCERTTS, Lee 

 Maxillary palpi with the third joint very small, the fourth very long. 

 C. batrisioides, Lee The only species; the an tennal joints are moniliform ex- 

 cept the last, which is very large, oval, inflated. Long 1.9 m. 

 m. Hab. — Mississippi Valley. 



