71G ZOOLOGY— INSECTS. 



72. STIZUS NEVADENSIS, sp. nov. 

 Plate XXXIII, Fig. 1. 



8 . — Black ; middle of face, clypeus, labrum, mandibles except tips, 

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

 rior margin of prothorax, sometimes narrow line over tegulae, and a band or 

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

 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 tibiae exteriorly, and base of posterior tibia?, 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. 0. 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 UNICIXCTA. 



Stizus unicincta, Sav, West. Quar. Rep., ii, 77 ; Am. Ent., pi. 2. 



<S 8 9 specimens; Colorado; Dr. H. (J. Yarrow, Wm. H. Ilance: New 

 Mexico; Dr. II. ( !. Yarrow, Dr. Oscar Loew. 



