THE LADY BEETIJiS. 511 



stems of the larger ragweed iAntbro:<ia frifich L.) in the low bottom 

 lands of the Wabash River. 



III. HippoDAMiA ;Mu1s. 1846. (A mythological name.) 

 Thorax snbtransverse. not margined at base; claws bifid; hind 

 tibial spurs distinct. Casey {loc. cif.) lists 27 species of tlie genus 

 from the United States, while Leug, in a later paper (loc. cit.), re- 

 duced these to ten. the others being regarded as either geographical 

 races or s>Tionyms. (Jf these four and one variety are known from 

 Indiana. 



KEY TO I.NUH.NA SPECIK.S OF HirPODAMlA. 



(J. Thorax lilaik with broail jiale bileral margins within eac-li cif wliieli is 



a blacli (lot: tiiiiiv and tarsi jiale. 074. IO-pu.xct.vta. 



(la. Thorax with a narrower white lateral margin, without distinet dot, Ijut 



usuall.v iutnidoil u|)on li.v a more or less pronounred au^ndatiou of 



the central blacli area; legs Ijlack tlironghout. 



h. r.laek disk of thorax uearl.v divided l>y a wliite quadrate spot at the 



middle of base, and an elongate triangular spot at apex. 



975. PAREXTHESIS. 



66. Black disk of tliorax withirut white spot at base and apex, but with 

 two discal divergent white dashes. 

 c. Front lialf of el.rtra without markings or with onl.v a humeral 

 black dot. 076. glacialis. 



cc. Elytra each with six small spots, three of which are on the front 

 half. 

 (1. Spots of elytra all small and widely separated. 



977. COXVEKGEXS. 



dd. Spots much larger, the fr(3nt one near suture apparently double. 



977a. VAR. 15-MACULATA. 



*974 (3050). HiPPODAMiA i:>prxcTATA Linn., Syst. Nat.. X. 170.5. 336. 



Oblong-oval. Head black at base : thorax described in 

 key and without discal divergent bars : elytra each with six 

 rounded black spots and a small common scutellar spot. 

 Readily known by the pale tibiiie and tarsi and the mark- 

 ings of the thorax. Length 4.5-5.2 mm. (Fig. 1S7.) 



Fig. 187 



Frequent throughout the northern half of State: (After luiey.) 

 less so southward. February 23-December 25. In one specimen 

 from Laporte County the black area embraces nearly the entire 

 upper surface of thorax and the spots of elytra are nearly double 

 the usual size. 



*975 (3051). HiPPODAMiA pakenthesis Say, Journ. Phil. Acad. Kat. Sci., 

 IV, 1S24. 93; ibid. II, 232. 



Oblong-oval. Head black at base and apex; thorax described in key: 

 elytra reddisli-yellow, witli n large triangular r-onimon scutellar spot, a 

 round spot on hunicrns. and a strongly curvod subapical lunule on each, 

 black. Length 4-5 mm. 



[33—23402] 



