244 MEMOIRS ON THE COLEOPTERA 



obtuse at the summit and nearer the base, the concave apical part 

 with numerous strong punctures bearing long setae, the apex trun- 

 cate and broadly, flatly beaded medially; hind tarsi fully as long as 

 the tibiae, the joints after the first longer than usual, the second joint 

 but very little shorter than the first; met-episterna with strong ir- 

 regular imbricate sculpture throughout, not discretely punctured 

 as they are in julianus. Length (9) 42.5 mm.; width 21.2 mm. 

 Panama (Culebra), Gaillard. A single example*. . *gaillardi n. sp. 



I found julianus attracted in abundance to the electric lights 

 at Alexandria, Louisiana, on June I, 1901, during some very hot 

 weather. In the complete stage of the male in this genus the 

 thoracic cavity is always smoother than in the incomplete stages, 

 but in that species the rugulosity is, in the complete stage, always 

 distinct and never entirely wanting as it is in roosevelti. Although 

 the clypeus is always smoother in the complete male, the sexual 

 difference in the sculpture of this part occurring in roosevelti 

 is very remarkable and cannot be observed in any other species; 

 in the incomplete stages of julianus (cf), the clypeal rugosity is 

 about as strong and dense as in the female and identical in char- 

 acter, but it is much feebler in the fully developed stage of the male; 

 in the female type of gaillardi, the sculpture of the entire surface 

 of the head is peculiar, being in the form of small and widely sepa- 

 rated, sharp elevations, and, in this species, the clypeal apex is 

 much broader than in the female of julianus and the eyes much 

 larger. In the type of tarsalis, the external sinus at the apex of 

 the hind tibiae is devoid of any trace of the usual medial tooth and 

 there is but one long seta; I cannot discover any such departure 

 from the normal among the other twelve species in my collection, 

 the largest of which is the Brazilian centaurus, described by Kolbe, 

 of which I have one female; the elytral punctures are strong and 

 conspicuous in this species, obsolescent suturally and apically, 



* In naming this species in honor of my old friend and corpsmate David Du Bose 

 Gaillard, it affords me an opportunity to express my deep regret that he should have 

 been denied the gratification of witnessing the completion of the great canal-cut at 

 Culebra, which would have crowned so fittingly a life of exceptional usefulness to 

 his country. Both Colonel Gaillard and his amiable wife, to whom he was devotedly 

 attached, took a lively interest in nature from every point of view, and I owe many 

 interesting specimens, casually found by them, to his thoughtfulness and generosity. 

 Only a few weeks before the fatal illness came upon him he gave a delighted circle of 

 friends, at the Cosmos Club in Washington, a most entertaining account of what he 

 and others had accomplished on the Isthmus of Panama. 



