308 H. C. FALL. 



subvariolate, and the outer antennal joints more acuminate. Tlie lateral tlioracic 

 spot is present in all examples seen, and is, as a rule, wider than in pulchella. In 

 one example there is a smaller spot within and tangent to the outer one, and in 

 some specimens there is a small yellow spot on each side of the prosternum. The 

 elytral ornamentation resembles in a general way that in certain forms of pul- 

 chella and is quite variable. It may be described as consisting of four (or five) 

 transverse yellow bands interrupted at the suture, the bands either fairly regu- 

 lar, or quite as often decidedly irregular and frequently so connected laterally as 

 to leave the margin entirely yellow. Length 6-9 mm. 



Ifai.— California (eastern or southeastern); Arizona (Prescott 

 and Fort Apache); Colorado (Glenwood Springs — Fenyes). 



The Prescott specimens are from the same source as in the pre- 

 ceding species, and to Mr. Blanchard is due the credit of first point- 

 ing out the differences between it and pulchella. The species is 

 dedicated to a friend in grateful remembrance of past favors. 



SCYTHROPIJS. 



With the accumulation of material it is becoming increasingly 

 apparent that Captain Casey was quite correct in remarking* that 

 the species of this genus are somewhat numerous! Four new species 

 were described by him in the paper mentioned in the foot-note, viz.: 

 ferrugineus, lateralis, cinereus and crassicornis, the first named from 

 two examples, the others from uniques. So far as I know none of 

 these are recognized in any other collections, and practically every- 

 thing is still referred either to elegans or to calif ornicus. I have 

 been able to \^Qnt\^y ferrugineus in material sent me by the National 

 Museum, where it passed as californicus, but I ara as yet quite unac- 

 quainted with the other species described by Casey. 



Both Horn and Casey were at fault in supposing the variation in 

 the relative lengths of the abdominal segments to be of a specific 

 nature. These differences are purely sexual, and substantially the 

 same in all species, the second segment being nearly equal in length 

 to the two following united in the female, but distinctly shorter in 

 the male. There are differences in the relative lengths of the fu 

 nicular joints and also in the form of the front and middle tibiae — 

 the latter in part sexual — which are of use in specific characteriza- 

 tion, but these — more especially the funicular joints— seem subject 

 to a sufficient an?ount of individual variation to make their use 

 hazardous except in series. 



*' On some New North American Rhynchophora. Ann. N. Y. Acad. Sci., iv, 

 1888, p. 274. 



