28 U.S. NATIONAL MUSEUM BULLETIN 290 



Also, the lateral pronotal spot is distinctly larger in a. alternans than 

 in a. jungovittatus. The seventh elytral stria of a. alternans is not 

 darkly pigmented; that of a. jungovittatus is pigmented. The meta- 

 sternum and abdomen of a. alternans are predominantly black; those 

 of a. jungovittatus are mostly yellowish or brownish. The anterior 

 faces of the femora of a. alternans are yello\vish, and each has a 

 moderate-sized, nearly median black spot; this part of the femora of 

 a. jungovittatus is mostly brownish with the margins yellowish. The 

 tibiae of a. alternans are black throughout; those of a. jungovittatus 

 are yellowish and brown. I find no differences between the external 

 and internal form of the male genitalia of these subspecies. 



This subspecies (and confiuentus melanoscelus) is described in detail 

 because of the closeness of members in the confiuentus group and the 

 difficulty in assigning with certainty specific and subspecific status in 

 this group. 



Cryptocephalus amatus amatus Haldeman 



Figure 39 

 Cryptocephalus amatus Haldeman, 1849, p. 253. 



Pronotum: Creamy yellow with four longitudinal orange or black 

 bands. Two median bands broadest at middle, lateral two bands 

 broadest basally, sinuate, sometimes vaguely coalescing near apex 

 with inner bands. Punctation dual, larger punctures minute to small. 



Elytra: Creamy yellow with black markings, punctures dark to 

 black. Markings as follows: third interval, vaguely darkened to black 

 at basal fourth to third and near apex; fifth and sixth intervals 

 darkened to black at apical half; humerus black; eighth interval 

 vaguely darkened to black nearly throughout. With eight rows of 

 punctures (sometimes evidently nine near base), fifth, sixth, and 

 seventh rows confused, punctures a Httle larger than usual, quite 

 distinct to apex; inner and outer rows distinct at apex, nearly always 

 clearly meeting. 



Prosternum : Lobed anteriorly and with a short, sharp, vertical spine 

 behind margin in male; that of female broadly lobed and somewhat 

 produced. 



Length: 3.4 to 4.3 mm. 



Discussion. — A single biological note records a specimen as taken 

 on foliage of Solanum elaeagnifolium Cav. ("Elagnijolium Solanum"). 



Distribution. — Only three specimens have been examined; one 

 each from Alpine and Cliisos Mts., Texas and one from INIelrose, 

 New Mexico. These are the first precise locality records for this 

 subspecies. 



