1190 



FAMILY LIII. CHRYSOMELmaE. 



twice as wide as long, narrowed in front, margins narrow ; disk convex, 

 smooth, shining. Elytra slightly wider than thorax, humeri almost ob- 

 literated; surface distinctly, finely and rather closely punctate. Length 

 5.5-7 mm. 



Dubois, Crawford and Spencer counties; scarce. May 10- June 

 22. Swept from low herbs along roadsides and from flowers of wild 

 hydrangea. Horn gives its range as North Carolina in Texas. A 

 member of the Austroriparian fauna. 



2198 (6957). DISONYCIIA TRIANGULARIS Say, Jonrn. Phil. Acad. Nat. Sci., 



IV, 1824, 84; ibid. II. 226. 



Oval, rather depressed. Black; thorax above and beneath yellow, with 

 the front pair of spots round, the hind one linear; elytra with a faint 

 bluish tinge; antenna' picemis. the three basal joints pale beneath. Tho- 

 rax more than twice as wide as long, sides feebly curved, margins very 

 narrow, surface alutacouus, rather finely, not closely punctate. Elytra a 

 little wider at base than thorax, surface rather closely but distinctly punc- 

 tate. Length 5-6.5 mm. (Fig. 521.) 



Throughout the State, frequent; more so in the northern coun- 

 ties. April 17-October 23. Occurs beneath logs in spring. Adults 

 said to be injurious to beets and spinach. Occurs especially on 

 CJienopodium and other herbs in moist places. 



*2199 (6958). 



DISONYCHA XANTI-IOMEIJENA Dalui., Analectii Ent., 1X2::, 79. 



Resembles the preceding but 

 usually smaller and more oblong. 

 Thorax entirely yellow; elytra 

 black with faint greenish tinge; 

 abdomen wholly yellow, meso- 

 aud metasterna black; femora 

 usually yellow on basal half, 

 sometimes wholly black; tibue 

 and tarsi piceous. Thorax not 

 twice as wide as long, surface al- 

 most smooth. Elytra wider at 

 base than thorax, surface finely 

 alutaceous, obsoletely and very 

 finely punctate. Length 4.5- 

 5.5 mm. (Fig. 523.) 



Throughout the State ; fre- 

 quent. February 14-Novem- 

 ber 8. Hibernates beneath 

 mullein leaves and rubbish. 

 Known as the "spinach flea- 

 beetle" on account of its in- 

 jury to that plant. Feeds 

 also on C li e n o p o d i u m and 

 is Fabr. 



J t J'ig. 523. A_W. (After Forbes.) 1 



chickweed, St< llarln. Listed as 



