AMPHIZOIDAE. 59 



iiclled beneath, and receiving the tibiiB, the latter slender and with 

 moderate leriuinal spurs, the anterior tibiae eiiiarji-inate vvitiiin, 

 the inner spur remote from the apex. Tarsi slender, very iecbly 

 flexile, the claws slender, feebly arcuate, and simple. 



This tribe is represented in our fauna by the g-enus Pficudo- 

 morpha with three species; one in the Southern States, the other 

 two in the Pacific region. 



The males have at the middle of the fourth and fifth ventral 

 segments a short transverse impression, which is pilose and 

 ciliate ; in the females these impressions are wanting. No other 

 sexual dilfereiiees have been observed. 



Fam. III.— AMPHIZOIDAE. 



Mentum deeply emarginate, with a medial tooth ; lobes 

 obtusely rounded; ligula large, quadrate, corneous; mental 

 suture wanting. 



Maxillte witli the outer lobe narrow, glabrous, pal|)iform, 

 but not biarticulate; the inner lobe curved, acute at the 

 apex, sparsely ciliate with spines on the inner side. 



Antennee 11-jointed inserted under the front, behind the 

 base of the mandibles; entirely glabrous, polished. 



Prothorax with the epimera and episterna moderately 

 distinct; prosternum produced behind over the mesoster- 

 num. 



Mesosternum protuberant in front, middle coxal cavities 

 round, closed externally in part by the mes-epimcra and 

 met-episterna. 



Metasternum truncate behind, not reaching the abdomen, 

 aute-coxal piece short. 



Abdomen with six ventral segments, the anterior three 

 connate. 



Legs slender, formed for walking; anterior and middle 

 coxae small globose; coxal cavities of the former not closed ; 

 posterior dilated internally, contiguous at the inner margin, 

 extending also to the margin of the body, separating the 

 side pieces of the metasternum from the first ventral seg- 

 ment. 



In addition to the characters given above, may be mentioned : 

 the head is broad, obtuse; the eyes very small; the labrnm very 

 transverse, sinuate in front; the palpi short, cylindrical; the side 



