354 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iis 



joint swollen, second small, third widened in basal part, then narrowed 

 with an outer hook, and at apex much narrowed, joints four to six long, 

 thence the joints becoming shorter. In the female, joints three to five 

 long and filiform and the remaining joints shorter. Prothorax rather 

 depressed and with a faint transverse sulcus, often only marked at the 

 ends, a narrow and inconspicuous lateral edging, scarcely a margin, 

 with a blunt tooth at the base. Elytra long, faintly costate, with the 

 intervals irregularly striate punctate; epipleura vanishing before the 

 apical curve; anterior coxal cavities open, legs long and slender, the 

 first tarsal joint of all feet long, claws appendiculate. 



Type species: Neobrotica vittatipennis (Jacoby). 



Remarks: The name Rachicephala is derived from the Greek paxi-s 

 meaning "spine," and Ke<pa\a, meaning "head." 



Rachicephala vittatipennis (Jacoby) 



Figure 104 



Neobrotica vittatipennis Jacoby, in Godman and Salvin, Biologia Centrali-Ameri- 

 cana, Coleoptera, vol. 6, pt. 1, p. 577, 1887. 



Jacoby had a single specimen of this from Juquila, Mexico, Salle 

 coll., and this a female. If he had had a male he would probably 

 have realized how unlike Neobrotica the species is. The development 

 of the appendages on the front of the head as well as the enlargement 

 of the third antennal joint are unlike that in Neobrotica or any species 

 known to me. 



Type female, BMNH, from Juquila, Mexico. 



Other locahties: Mexico: one specimen, Cuernavaca (Bowditch 

 collection), also two specimens in the U.S. National Museum from 

 Cuernavaca collected by N.L.H. Krauss in August 1955; Guadalajara. 



Cyclotrypenia, new genus 



Elongate oblong, the head with a smooth occiput and a median 

 depression over the frontal tubercles, carina short and not prominent, 

 lower front rather bulging but not protuberant; in the male over the 

 labrum a median hole, almost as large as the antennal socket; no 

 trace of this in the female. Antennae reaching the middle of the 

 elytra, filiform, in the male the thu-d joint a Httle longer than in the 

 female, but in both sexes longer than the fourth joint, remaining 

 joints shorter. Prothorax without a lateral edging, a faint transverse 

 sulcus across the disc, sometimes only a dent on each side. Elytra 

 smooth and flat, without depressions. Epipleura vanishing at apical 

 curve. Anterior coxal cavities open. First tarsal joint of anterior 

 legs inflated and the front tibiae much enlarged at apex. First 

 tarsal joint of hind legs as long as the remaining joints together. 

 Claws appendiculate. 



