14 Journal New York Entomological Society. [Voi. vii. 



Habitat : One example from Winslow, Arizona (Wickham), an- 

 other in the Horn collection from New Mexico. 



Nearest plagiaticaiida, but differing somewhat in naarkings and 

 distinctly in its different shaped and less transverse prothorax. Rccti- 

 collis, plagiaticaiida, jocosa and coqiiilletti form a group of rather closely 

 allied species, agreeing well in the form of the prosternal margin and 

 the character of the apical ventral plate. The two last are much 

 smaller than the others and very constant in markings. Their separa- 

 tion by means of the tabular characters could not be difficult. 



A. plagiaticauda Horn, Trans. Am. Ent. Soc, VII, p. lo, PI. 



I, Fig. 8. 



A large species, which is apparently rare. I have seen only three 

 examples, viz., one specimen each in the cabinets of Leconte and 

 Horn, the third collected by Coquillett in Los Angeles county, Cal., 

 and differing from the type in that the spots are in part yellow instead 

 of being entirely red. The prosternal cusps are very prominent, the 

 apical ventral plate thick and acute behind with somewhat uneven 

 outline. Length, ii mm., .44 inch. 



Habitat : California (Mariposa and Los Angeles counties). 



A. jocosa, sp. nov. 



Moderately robust, black, shining, without metallic lustre. Elytra each orna- 

 mented with a longitudinal series of four yellow spots ; the first rather large, within 

 and posterior to the umbone ; the second median large, subtransverse reaching from 

 the third or fourth stria to the lateral margin ; the third smaller and nearer the suture, 

 the fourth smallest, subapical. There is a red marginal spot at the apical third which 

 may or may not be connected with the third discal spot. The head is densely punc- 

 tured as usual, front moderately convex, vertex without carina. Thorax not wider 

 than the elytra, twice as wide as long, sub-parallel to middle, thence moderately 

 rounded to the apical angles, lateral margin not visible from above ; disk very finely 

 and sparsely, sides more coarsely and closely punctate. Elytra subparallel to apical 

 third, umbone moderate, strial punctures not coarse, intervals nearly flat on the disk, 

 uniseriately punctulate ; erect hairs rather long, fuscous on the elytra, fuscous, mixed 

 with cinereous toward the base, on the thorax. Prosternum trisinuate with stout cusps, 

 sparsely punctured at middle. Abdomen very finely sparsely punctulate at middle, a 

 little more coarsely and closely at sides. Last segment with narrowly rounded rather 

 thick apical plate. Length, 7-9 mm., .28-. 36 inch. 



Habitat : Foothills of the Sierras of southern California. 



This species does not exhibit much variation ; there may be a small 

 spot external to the basal, and there is occasionally a very small apical 

 marginal red spot, which is seldom present on both sides. 



