1018] Alydiuce of the United States 263 



near tip with a serrate and dentate ridge; posterior tibia expanded, 

 crenulate on the anterior margin at the curve. Female with the 

 posterior femora anned with four large spines and two small teeth; 

 posterior tibise less expanded, not crenulate. 

 Size 14-17 X 2.5-3 mm. 



This variable tropical species is well knowai from Mexico 

 to Brazil and has been captured in Texas-, Arizona^ and 

 California.^ 



7. Hyalymenus longispinus Stal. 



Hyalymenus longispinus Stal (1870) 213; Banks (1910)i; Barber (1914)2. 

 A/ydus (Camptopus) sinuatus Guerin (1857) 390, 391; (nee H. S., nee Fabr.) 



Stal introduces longispinus as a new name for the Cuban 

 species which Guerin identified and described Sis' ' sinuatus 

 H. S.," with the only added information that it differs from 

 tarsatiis in the fact that the spines of the lateral angles of the 

 pronotum are twice as long and directed more nearly dorsad. 

 The characters given in the key are taken from a female kindly 

 loaned by Mr. H. G. Barber, who records the species from 

 Florida. 1-2 It is slightly smaller than H. tarsatus. 



S. Hyalymenus pulcher Stal. 



Alydiis pulcher Stal (1854) 235. 



Hyalymenus pulcher Stal (1870) 211; Distant (1881) 156, (1893) 372; Banks (1910)'. 



Banks lists this Central American species as occurring in 

 Texas. 1 It differs from //. tarsatus in the black color of the 

 antennae and in the absence of the pleural white spots. The 

 anterior margin of the posterior tibiae of the male is entire and 

 the posterior femora are provided with a series of small teeth 

 throughout their length. Distant's statement that it can be 

 distinguished from ' ' all varieties of H. tarsatus by the marginal 

 ventral spines" is apparently incorrect, as this is a secondary 

 sexual character in both species. The armature of the femora is 

 distinctive, however, and the tibiae and apices of the posterior 

 femora are nearly alw^ays black. Size 17 x 3.5 mm. 



Megalotomus Fieber. 

 Logotype limbatus Herrich-Schaeffer =yMwcgM5 Scopoli. 



Megalotomus Fieber (1861) 58, 226; Stal (1872) 54, (1873) 90, 92; Montandon (1893) 



50. 

 Alydus Stal (1867) 542; (1870) 214. (in part). 

 Huphus Mulsant and Rey (1870) 158, (a palearctic subgenus of Megalotomus. 



The lateral angles of the pronotum are more acute and the 

 body and legs are more elongated and slender in this cosmopoli- 



