no. 3649 LEPTOFERONIA — HACKER 25 



Head. — Frontal impressions nearly straight and not recurved 

 posteriorly, forming an angle somewhat less than 80°. 



Pronotum. — Sides arcuate in middle, oblique posteriorly, sinuate 

 immediately before hind angles; anterior angles more prominent than 

 in fuchsi. 



Legs. — Hind femur robust but not obtusely angulate; small setae 

 present on ventrolateral margins of last article of tarsus. 



Sixth abdominal sternum of male (fig. 11). — Two large blunt 

 tubercules, left somewhat larger; no carina or third tubercule between. 



Aedeagus (fig. 11). — Eight paramere bisinuate, of nearly equal 

 width for entire length. Median lobe with large unsclerotized area on 

 ventral surface. 



Length of body. — 8.0 mm. 



Allotype female. — Same as holotype except for usual female 

 differences; elytral humeri slightly more rounded; length of body 

 7.5 mm. Other specimens range in length from 7.5 to 9.0 mm. 



Type.— USNM 69604. 



Type-locality. — Four miles south of Honeydew, Humboldt 

 County, Calif. 



Specimens examined. — 81. 



Distribution (fig. 37). — Holotype, male, and allotype, female, 4 

 miles south of Honeydew, T. 3 S, R. 1 E, Humboldt meridian, elev. 

 1500 ft., Humboldt County, Calif., July 3, 1964, H. A. Hacker. Also 

 the following paratypes: 1 male, 3 females, same data as holotype; 

 2 males, 1 female, 1 mile south of Honeydew, T. 3 S, R. 1 E, elev. 

 200 ft. ; 3 males, 2 females, 3 miles northwest of Upper Mattole, T. 

 2 S, R. 1 W, elev. 100 ft.; 2 males, 3 females, 2 miles southeast of 

 Petrolia, T. 2 S, R. 2 W, elev. 100 ft. Other specimens were collected 

 from as far south as the Rockport area in Mendocino County, as 

 far north as McCann, Humboldt County, and to an elevation of 

 2300 feet. 



Remarks. — This species resembles fuchsi more than it resembles 

 lobatus. In addition to the male differences, it differs from lobatus in 

 the following characteristics: shallower pronotal longitudinal im- 

 pressions; larger elytral humeri; stronger elytral microsculpture; 

 more robust metaf emora ; and a less bulbous body outline. Externally 

 it differs from marinensis in the following: more nearly rectangular 

 elytral humeri; sides of the pronotum oblique, rather than arcuate in 

 the basal third; anterior and posterior angles more prominent; longi- 

 tudinal impressions slightly sharper; and transverse impression 

 strong. The name is derived from the Mattole River, near which the 

 types were collected. 



