AMERICAN COLEOPTERA. 201 



Yellow, prothorax not varied; elytra with seven deep regular discoidal 

 striee, the sutural stria being reduced to three or four punctures, and the 

 seventh to a sraall hook attached to the eighth in front of the middle; 

 alternate interspaces spotted with brown; prosternuin nearly truncate 

 in front, feebly emarginate behind; 9; 3 min.; Texas: two specimens. 



18. defectum n. sp. 

 Ferruginous or brown : prothorax with sides, and sometimes two discoidal 

 spots yellow; elytra with finer regular strise, which are alternately more 

 approximate, and three narrow oblique black stripes, seventh stria re- 

 duced to a short hook ; prosiernum with two large rounded lobes behind ; 

 % with an acute elevated apical process, 9 nearl}' truncate; '^ 9; '^ — 



5.5 mm.; Ks.; Tex.; N.Mex.; B. Col 19. COilflueiiS Say. 



a. — Piceous black, elytral stripes broad, confluent, leaving traces of 

 narrow yellow lines; %. 

 Dirty yellow, varied with brown; elytra with eight deep strongly punc- 

 tured striae, somewhat approximated by pairs, sixth obliquely dislocated 

 behind, seventh short; stripes three on each elytron, ill-defined, some- 

 times wanting; prothorax brown, with sides and basal spots yellow; 

 prosternum with apical lobe acute in 'J, , obtuse in 9- 4 — 5 mm.; Cala., 



(S. Diego) 20. spurciis Lee. 



a, — Prothorax yellow, immaculate. 

 8. — Robust, shining, rufous or ferruginous; elytra yellow, usually with two 

 broad oblique black stripes, striae fine, not impressed; prothorax finely 

 punetulate, with sides and two oblique basal spots yellow; '^ 9 j venustus 

 Fa.br., SuQY. ; JlaccidusSnffr. ; 4.3— 5.3 mm.; jST. Y. ; III.; Ks.; Ga.; Tex. 



Varies greatly in color 21. Tenustus Fabr. 



a. — Protliorax entirely ferruginous; ornatus Fabr. (nee SufFr.). 



fS. — Elytral strijjes more or loss confluent. 



y. — Elytra black with sides, apical hook and narrow basal spot yellow : 



% ; hamatus Mels. 

 S. — Elytra black, with sides and apical margin yellow; 'J, 9; cinctipennis 



Eandall. 

 £. — Elytra yellow, with a small brown humeral spot; 9; simplex Hald. 

 Robust, dull yellow, tinged with ferruginous, less shining; elytra with 

 usually ill defined brown stripes; with ten regular strongly punctured 

 deep strise; jjrothorax densely punctured; % 9j incertas Hald., (nee 



Olivier); ornaiwi- J Sufl'r. ; 5 mm.; Ga. ; Fla 22. obsoletus Germ. 



9. — Prothorax smooth or finely punctured 10. 



Prothorax very coarsely and usually densely punctured 17. 



10. — Elytra with two broad oblique stripes 11. 



Elytra with three narrow, sometimes ill-defined stripes 15. 



Elytra spotted or fasciate K). 



Bright yellow, elytra black, with eight deep punctured discoidal striae, 

 (the real seventh being very short); prosternura flat, feebly lobed in 

 front, obtusely bilobed behind; antennae dark, base pale; '^ 9^ 2.5 — 

 3.2 mm.; Ark.; Fla» 23. nanus Fabr. 



'•This species would perhaps be equally well placed after defectus but the 

 elytra are not striped, and the presternum of the % is not lobed. The %, of 

 the latter is not known, but the resemblance to Xo. 13 in marking is very 

 obvious. 



TRANS. AMER. ENT. SOC. VIII. (26) JULY, 1880. 



