716 ZOOLOGY INSECTS. 



72. STIZUS NEVADENSIS, sp. nov. 

 PLATE XXXIII, FIG. 1. 



e? . Black ; middle of face, clypeus, labrum, mandibles except tips, 

 anterior orbits ending in two dots within the ocelli, tubercles, narrow poste- 

 rior margin of pro thorax, sometimes narrow line over tegulse, and a band or 

 two spots on scutellum, both sometimes wanting, yellow ; base of antennae 

 ferruginous ; tegulse dull honey-yellow, with a yellow spot anteriorly ; thorax 

 with a very short, dense, changeable pile ; wings pale yellowish-fuscous ; 

 marginal cell darker ; costa more deeply tinged with yellow ; legs ferrugi- 

 nous, sometimes more or less black at the base ; anterior femora beneath, 

 four anterior tibire exteriorly, and base of posterior tibise, yellow ; abdomen 

 shining, pale yellow above ; base of first segment and basal and apical 

 margin of all the segments narrowly black ; on each side of first segment 

 anteriorly an oblique, generally bifurcate, black mark ; anterior margin of 

 second segment more or less undulate, and on each side anteriorly a rounded 

 black spot ; a short, oblique, black line on each side of second and third, 

 and sometimes fourth, segments posteriorly ; the yellow band on fifth, and 

 sometimes fourth, segments deeply indented with black on each side anteri- 

 orly ; sixth segment with a large, transverse, yellow mark ; apical segment 

 black, tipped with ferruginous ; the anal spine rather long and acute; some- 

 times the base of second segment is ferruginous ; venter black, sometimes . 

 varied with ferruginous ; a yellow band on posterior margin of second seg- 

 ment deeply indented laterally ; three following segments with a lateral yel- 

 low line or spot. Length, 10-12 lines. (Trans. Am. Ent. Soc., 1875.) 



3 specimens ; Eastern Nevada ; 1872 ; Dr. H. C. Yarrow. The pre- 

 vailing color of the dorsal segments of abdomen is a pale yellow; the bands 

 occupying nearly the entire width of the segments, leaving only a narrow, 

 black margin at base and apex ; the basal margin of the yellow on first 

 segment is more or less sinuous. 



73. LAERA UNICINCTA. 

 Stizus unicincta, SAY, West. Quar. Eep., ii, 77 ; Am. Eut., pi. 2. 



8 (? 9 specimens; Colorado; Dr. H. C. Yarrow, Win. H. Hance: New 

 Mexico; Dr. H. C. Yarrow, Dr. Oscar Loew. 



