304 PROCEEDINGS OF THE NATIONAL MUSEUM vol.87 



Type locality. — Plancha Piedra, between British Honduras and 

 Guatemala. 



ry;^^.— Male, U.S.N.M. No. 52942. 



Remarks. — The single male at hand was collected at Plancha 

 Piedra, on the border between British Honduras and Guatemahi, in 

 the Peten Department, October 27, 1925, swept from weeds (A. 

 Dampf). 



MORDELLISTENA LATICORNIS, new species 



Figure 16, U; 18, fc 



This species is most closely allied to hexastigma Champion (1891, 

 p. 321) and may be separated from the latter member of the genus 

 by the unicolored antennae, the different nature and position of the 

 spots on the elytra, the much greater length and breadth of the 

 fourth antennal segment, the different shape of the distal segment 

 of the maxillary palpi, the small number of combiike ridges on the 

 posterior tibiae and tarsi, and the smaller size. 



Length: 2.5 mm.; including anal style, 3.45 mm. Form moder- 

 ately robust, subcuneate, elytra broadest at base, thence narrowing 

 to apex, body broadest near base of pronotum. Head, pronotum, 

 antennae, mouth parts, spurs of posterior tibiae, and legs, except 

 posterior femora, fiavocastaneous; ventral surface, except last ventral 

 segment and base of anal style, and elytra, piceous black, the elytra 

 w'ith a castaneous, semilunate, humeral fascia, curving posteriorly 

 and mesad, not reaching suture and extending one-fourth into disk; 

 posterior femora, last ventral segment, and base of anal style fusco- 

 castaneous. Body densely covered with fine, recumbent pubescence, 

 partaking of ground color on castaneous areas, whitish yellow on 

 ventral surface, black on elytra, except for following whitish areas: 

 a semilunate fascia overlying castaneous dermal spot mentioned 

 above, a broad, transverse, postmedian fascia, interrupted at suture 

 and not quite reaching lateral margins, and a short area covering 

 the extreme apex. 



Antennae 1.1 nun. long, reaching basal abdominal segment; segment 

 4 one-half longer and much broader than 3; 5-10 each one third longer 

 than 4, broad, flattened, but not serrate, broadest subapically; 11 dis- 

 tinctly longer than 10, sides and apex rounded, broadest medially. 

 Distal segment of maxillary palpi enlarged, form of an elongate 

 scalene triangle, outer margin straight, mesal and apical edges and 

 corners rounded, broadest at apical third (fig. 16, A). Pronotum dis- 

 tinctly broader than long (0.85 by 0.7 mm.), sides and apex rounded, 

 basal angles obtuse, base arcuate, midbasal lobe short, but rounded. 

 Scutellum moderately large, triangular, sides straight, apical angle 

 rounded. Elytra slightly more than twice as long as broad (1.8 by 



