292 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



Forma inflata. — San Jose del Cabo, collection Charles Fuchs. 



Forma grandis. — Calmalli mines, collection California Academy 

 of Sciences. 



Number of specimens studied, 140. 



Type in the LeConte collection. 



Type-locality. — Cape St. Lucas, Lower California. 



Salient type-characters. — Thorax quadrate, apex deeply emargi- 

 nate, apical angles porrect and acute, but not acuminate ; sides mod- 

 erately rounded, basal angles obtuse; disc moderately convex and 

 sparsely punctulate. Elytra oval and convex, acutely attenuate be- 

 hind, strongly striato-punctate, stria* slightly impressed, intervals 

 punctulate (LeConte). 



Diagnostic characters. — The characters that separate this race from 

 eschscholtzii are very feeble. In luco; the apical angles of the pro- 

 thorax are more strongly prominent anteriorly and the apical mar- 

 gin more strongly emarginate. The prothorax is less typically quad- 

 rate and the cauda is less attenuated toward tip. From the differ- 

 ences presented by the series before me, I have no doubt but that a 

 larger series from the different geographical regions would prove 

 these differential characters of no value. 



In the strongly developed males with long caud» the hind tibia? 

 are more or less arcuate in the basal half and rather abruptly dilated 

 in the apical moiety, these characters are not evident in the ecaudate 

 form. 



From the forms of aruticauda it is separated by the striato-punc- 

 tate elytra, by the sides of the pronotum being quite feebly rounded, 

 and by the elytral apices being more abruptly attenuate, the cauda 

 being horizontal. 



From clentipes it is readily known by the quadrate protliorax with 

 feebly rounded sides. 



Forma inflata has to be separated from roifrlcosa by the sides of 

 the pronotum being less convergent anteriorly and by the greater 

 width of the apex as compared Avith the base; the elj^tra are not so 

 decidedly inflated and the apices are not i)roduced in the females. 

 This form appears to lead toward rentrlcosa — in fact may be inter- 

 mediate, but undoubtedly has great affinity with luca'. A large 

 series of both species would no doubt demonstrate this relationship. 

 The males are probably ecaudate. 



Forma grandis is a wonderful specimen of gigantism — such phe- 

 non)enal devclojjment makes the liuiiling of species exceedingly diffi- 

 cult in (he absence of an ample series. The epipleura^ are wide at 

 the humeri and rather rapidly narrowing to o}iposite the meta- 

 sternal epimera, thence narrower, with margins gradually converging 

 to apex. Fourteen series of very fine punctules are clearly indicated 

 upon each elytron. 



