104 U.S. NATIONAL MUSEUM BULLETIN 25 6 



at Gonzales, Villa Juarez, and Tampico, in the southeastern portion 

 of the State of Tamaulipas, and at Panuco in the adjacent part of the 

 State of Vera Cruz. The host plants were Opuntia lindheimeri, another 

 prickly pear, and an Acanthocereus. 



Moneilema albopicta White 



This is another Mexican form with white markings on the prothorax 

 and elytra. Adults have been observed from March to May at Tehua- 

 can. State of Puebla, and at Cuemavaca, State of Morelos. They 

 occurred in small numbers during August to November at Cuautla, 

 State of Morelos, feeding on a low-growing Echinocadus and on young 

 growth from fallen stems of Opuntia lasiacantha. It is possible that two 

 generations are completed during the year; in the only rearing record, 

 beetles emerged in the latter part of September from eggs laid in May. 



CoLEOPTERA ! Curculionidae 



Most of the weevil enemies of cactus are contained in two genera 

 which are truly cactus-feeding segregates, viz., the cryptorhynchid 

 genus Gerstaeckeria, with many species, and the calandriid genus 

 Cactophagiis, with four species. In addition, three species belonging to 

 as many genera appear to be restricted to cactus hosts. With the 

 exception of one Peruvian and one Paraguayan species, all the cactus 

 weevils inhabit North America. Listroderes costirostris obliquus (Klug) 

 was recorded in December 1958 on Harrisia bonplandii in Paraguay. 



HUARUCUS Marshall 

 This genus was erected for the reception of a cactus weevil from Peru. 



Huarucus cacti Marshall 



A stout, dull-colored, mioderately large weevil, 10 to 15 mm. in length, 

 H. cacti was described from material obtained at Huanuco (altitude 

 7,000 feet), Peru, in December 1928, when both adults and larvae 

 were observed. The larvae tunneled in the segments of the prickly 

 pears Opuntia ficus-indica, and 0. macbridei, the Cylindropuntia 0. 

 exaltata, and certain other cacti. 



In October 1936 adults and larvae were again found at the same 

 locality. The larvae were abundant and were causing considerable 

 damage to Opuntia ficus-indica and to the Cereus Espostoa lanata. In 

 the same month larvae were observed in stems of a Cereus, either 

 Trichocereus sp. or Borzicactus sp., at Santa Eulalia in the Rimac Valley, 



