SPHiEROMA CURTIIM. 413 



and from which the following description is made, as well 

 as the accompanying figures are taken. 



The upper surface of the animal is quite smooth. The 

 head is produced into a small, somewhat hastate point in 

 front. The upper antennas have the very large flat basal 

 joint affixed by a small rounded rotule ; the second joint 

 of these antennse is transversely oval, followed by two 

 slender joints, and about eight articuli, forming the flagel- 

 lum. The lower antennas are but little longer than the 

 upper. The first segment of the body is dilated at the 

 sides ; both the anterior and posterior angles being pointed 

 and produced. The three following segments are pointed 

 at the extremity of the lateral margins ; and the three 

 terminal segments have the lateral angles more ovate. 

 The tail has the first segment distinctly indicated by 

 a transverse slightly impressed line, extending across 

 the whole breadth of its base, the middle portion of 

 the line extending rather more backwards than the side 

 portions, which reach only to the inner portion of the 

 terminal lateral lobe of the seventh segment of the body. 

 The second, third, and fourth segments of the tail are 

 confluent in tlie middle of the back, and in certain lights 

 the posterior margin of this confluent mass exhibits 

 traces of two small tubercles, wide apart, in front of the 

 two large dorsal rounded tubercles of the terminal seg- 

 ment. The last segment has the middle of its extremity 

 produced into an obtuse point, which is slightly notched 

 on each side ; and on looking at the animal from behind 

 this part appears semitubular, the produced apex forming 

 a small arch. The lateral appendages of the tail do not 

 extend so far back as its extremity, and they have both 

 divisions obliquely truncate, and very slightly emarginate. 

 In the above woodcut the right-hand figure v represents 

 the right-hand portion of the hind part of the body and 



