H. C. FALL. 59 



equal to half the width of the latter. First and second funicular joints equal or 

 nearly so. Prothorax as long as wide, not strongly constricted in front sides 

 moderately arcuate. Elytra but slightly wider than the prothorax, humeri not 

 prominent. Length 3.9-4.5 mm.; two and two-fifths times as long as wide. 



California (Santa Monica and San Diego). 



Tiie Santa Monica specimens are to be regarded as typical. The 

 two examples in my collection were taken by me in the sand dunes 

 close to the beach beneath a low plant in the stems of which the 

 insect probably breeds. The San Diego specimen is much more 

 conspicuously marked, the dark brown scales which are few and 

 found only in the basal thoracic and central elytral spot in the 

 types, being scattered also throughout the surface, both above and 

 beneath. The eyes are a little less widely separated, and their innei- 

 margins less evidently divergent superiorly. The form and stvle of 

 rnaculation is, however, identical with the types and I doubt not it 

 is merely a variation due perhaps to different habital surrounding. 



C mediinollis n. sp. — Rather elongate, subparallel, prothorax moderately 

 strongly constricted at apex, the sides behind the constriction straight and 

 slightly but distinctly sinuate at middle. Scales of upper surface white, pale 

 brown and dark brown, the last named condensed in two basal thoracic spots 

 which become confluent at the middle of the disk, and in a large parabolic spot 

 outlined with white occupying approximately the middle third of the length of 

 each elytron and in width interspaces 2-8. Second funicular joint distinctly 

 shorter than the first; interocular space narrowest at or slightly above the mid- 

 dle, varying in width from approximatel.v one-half to about one-fourth the width 

 of the eye. Length 2|-4 mm., and 2J times the width. 



Southern California (Pasadena and San Diego). 



This, next to adspersus, is the most common species of the genus 

 in Southern California. I have beaten it from sunflowers (Helimi- 

 thus) in April at Pasadena, but if my memory serves me, examples 

 collected by myself at San Diego in February — years ago — were 

 found upon a difl^erent plant. The species goes as lunatus in some 

 collections, but the latter, though superficially in some degree simi- 

 lar, belongs to the section of the genus with non-tuberculate second 

 ventral segment. Mediinotus difl^ers not only from littoralis as indi- 

 cated in the table, but also from all the other species of this group 

 in having the second funicular joint evidently shorter than the first. 



The species with simple second ventral segment seem to be much 

 better known than those of the preceding group, and I have only 

 two to add to those previously described. 



TEANS. AM. ENT. SOC. XXXII. J.VNUABY, 1906. 



