106 Journal New York Entomological Society. [Voi.vn. 



angles is always more or less pale. The four species in my cabinet 

 may be separated by the following characters : — 



Elytra together with two large obliquely oval red spots, the side margins not at all 

 thickened ; abdomen black. Sonoran regions 2 



Elytra with three smaller red spots one of which is sutural, the edges with a strongly 

 thickened bead ; abdomen red throughout. Atlantic regions .4 



2 — Elytra quite broadly reflexo-explanate at the sides ; upper surface strongly shin- 

 ing ; body large, broadly rounded behind in both sexes, the male with the 

 elytral spot rather small, but slightly oval, extending from basal fifth or sixth ta 

 the middle and from inner third or fourth to outer fourth or fifth, the spot in the 

 female larger, extending from very near the base at outer two-thirds to the mid- 

 dle and from inner fourth to outer sixth or seventh near the humeri. Length 

 6.0-6.7 mm.; width 5.2-5.75 mm. Arizona; [texanum Lee]. 



plagiatum Oliv. 



Elytra very narrowly, and but slightly, less declivous toward the edges, the body 

 smaller 3 



3 — Body broadly rounded behind, alutaceous in lustre, the elytral spot in the female 

 rather small in size, rounded, with the anterior outline oblique and emarginate, 

 extending from basal sixth to the middle and from inner two-fifths to outer fourth ; 

 abdomen and legs black as in plagiatum. Length 5.3 mm. ; width 4.6 mm. 

 New Mexico ( Las Vegas) alutaceum, sp. nov. 



Body pointed and ogival behind, the elytra polished, the spot similar in the sexes and 

 very large, obliquely and broadly oval, extending from the basal margin — which 

 it very narrowly attains or virtually attains at outer two-fifths — to three-fifths of 

 the length and from inner fifth or sixth to outer eighth, where the outline is 

 parallel to the side margin for a considerable distance. Length 5-3~5-7 nim. ; 

 width 4.6-5.I mm. California (Los Angeles) and Arizona. . ... pleurale Lee. 



4 — Body very broadly oval and compresso-convex, the upper surface strongly shining, 

 the pronotum more alutaceous, with the entire apical margin very finely and indefi- 

 nitely paler ; elytra very broadly ogival at tip, each with a small parallel-sided 

 red spot extending, parallel to the side-margin, from the base at outer two-thirds 

 for one fifth the length, and also with a small oval red spot on the suture at 

 apical third ; legs black. Length 6.6 mm. ; width 5.6 mm. Rhode Island. 



tripustulatum DeG. 

 Tripitstulatum does not seem to be at all abundant, and my cabinet 



contains only the single specimen taken some twenty years ago. Pila- 



tei of Mulsant, because of its red abdomen, is almost surely specifically 



different from plagiatum ; it is said to be from Texas but I have not 



seen a representative. 



Exochomus Rcdt. 



The metacoxal plates are rounded as usual, but they are not com- 

 plete as stated by Crotch, the bounding arc not quite attaining the 

 basal margin of the first segment. The species are rather numerous, 

 and are much smaller and generally less convex than in the preceding 



