424 BULLETIN G3, UNITED STATES NATIONAL MUSEUM. 



gigantea; specimens taken more inland oraduallv approach the 

 typical form of the last named species, Estriata is not common. 



General ohseriv/tloihs.— The mentum is trapezoidal to trapezoido- 

 parabolic, more or less feebly convex, rather coarsely punctate, each 

 puncture with a rather long hair. 



The prosternum as in gigantea, except that the small conical mucro 

 is usually obsolete. 



Mesosternum as in gigantea. 



The abdominal intercoxal salient is quite quadrate and about a 

 fifth of its width broader than the metasternal j^rocess. 



The post-coxal part of the first abdominal segment is about equal 

 to the second in length ; the second segment is about a fourth longer 

 than the third, the latter being about a half longer than the fourth. 



The metasterum laterally between the coxa^ is about equal in length 

 to the width of a mesotibia at apical fourth. 



The profemora are scarcely at all swollen, and the surface lines 

 are evenly and rather feebly arcuate, not distinctly subclavate. al- 

 though slightly narrowed at base; tibial grooves strongly defined by 

 the rather coarse cariniform margins, which are feebly arcuate and 

 convergent, becoming contiguous at the femoral base and there 

 slightly evanescent. The protibise are obsoletely carinate externally 

 and oval in section, the tarsal grooves are obsolescent. 



The mesofemora are somewhat varialile as to point of greatest 

 width : surface lines subparallel, noticeably convergent in basal 

 fourth ; tibial grooves distinctly concave, margins not cariniform ; 

 evanescent at basal third before becoming contiguous. The meso- 

 tibia? are oval to cylindrical in transverse section; tarsal grooves not 

 impressed and recognized as a smooth surface between the sparse 

 asperities. 



The meta femora have the surface lines subparallel, slightly nar- 

 rowed in basal fifth ; tibial grooves as on the mesofemora and evanes- 

 cent at or basad to the middle. Metatibiie variable, but with general 

 characters as in the mesotibise. 



The articular cavities are quite closed on all the tibise. 



The tarsi are variable as to stoutness and moderate in length. 



The ])rotarsi are about a fifth of their length shorter than a meso- 

 tarsus. Joints 2— t, inclusive, short and subequal in size and together 

 about equal to the length of the fifth: first joint one-half longer than 

 the second. 



The mesotarsi are just a little longer than a metatarsus. Joints 

 '2-A are sul)equal and together just a little longer than the fifth; the 

 first is subequal to the second and third taken together. A metatarsus 

 is a little more than half as long as its metatibia. Joints two and 

 three are subequal in size, a littl(> longer than wide, and together 

 equal to the length of the fourth or first. 



