28 G. ir. HORN, M. D. 



^. Tlieveiietii, n. sp. — Black, with slightly bluish tinge, thorax rufmis 

 with (liscal black spot. Head smooth, witli slight transverse impression. An- 

 tennfB black, pectinate %. Thorax broader than long, sides feebly, base more 

 decidedly arcuate, hin<l angles broadly rounded, slightly reflexed, surface 

 smooth, feebly shining. Elytra bluish, opaque, finely scahn>us, at tip appen- 

 diculate, sutural angle prolonged in a long coriaceous process. Body beneath 

 and legs black with tinge of blue. Length .20 inch; 5 mm. 



The elytral appendices are as usual inferior but not concealed en- 

 tirely from above. The sutural prolongation is limited externally by 

 a deep sinuation of the elytra. , 



One specimen collected by Dr. Alphonse Thevenet, Mariposa county, 

 (California, in the collection of Dr. Leconte. 



The addition of the above species requires some modification of the 

 table given by me (Trans. Am. Ent. Soc, 1872, 113) for those species 

 in which the male has pectinate antennae. 



Antennae pectinate in the male. 

 Elytra appendiculate in the male. 

 Appendices entirely concealed from above, suture prolonged in spiniform 



process, tipped with rufous Slipiiiipenniis. 



Appendices visible from above. 



Elytra % either entirely yellow or tipped with pale rufous, sutural an- 

 gle appendiculate, appendix slender, hind tibire yellowish testaceous. 



miraudiis. 

 Elytra % entirely blue, sutural angle with long but not very siemicr ap- 

 pendix, legs entirely black tinged with blue Thevenetii. 



P^lytra not appendiculate in the male. 



Elytra bluish with broad oblique vitta from humerus to suture macer. 



Elytra bluish tipped with yellow % mixtus. 



Elytra entirely black % Ulkii. 



KTIBIA, Horn. 



S. ovipcnnis, n. sp. — Form moderately robust, color piceous black, shi- 

 ning. Head coarsely and densely punctured, punctures slightly strigose, 

 especially in front. Thorax nearly twice as wide at middle as long, apex 

 deeply emarginate, base feebly arcuate, sides regularly and rather strongly ar- 

 cuate, disc convex, densely and coarsely punctured, punctures slightly strigose 

 near the sides. Elytra regularly oval, slightly more attenuate at apex, one- 

 fourth broader than the thorax and nearly four times as long, convex, with 

 coarse punctures placed in striae at the middle of each elytron, confusetl at the 

 sides and near the suture and totally obliterated at apical third. Thorax be- 

 neath very coarsely punctured, abdomen obsoletely and very sparsely punc- 

 tured, inesosternum coarsely punctured, metasternum very coarsel}' cribrate. 

 Length .14 — .18 inch; 3.5 — 4. a mm. 



Male. — First ventral segment with a broad, shallow, coarsely punctured 

 fovea behind the intercoxal process, last ventral segment nearly smooth. 



Female. — First ventral segment slightly punctured at middle, not foveate, 

 ast ventral rather coarsely jjunctured. 



