SYNOriSIS OF THK LAMUN.E. 155 



Forms of 0. tvlpuiicfittd v:ir. biviaculata. 



Lejis nearly or (jiiito bhiek. 



Thorax, often the cervix, yellow, without spots alliiiiM H;ir. 



Thorax with two discal spots and entii-e basal marfjin black. . . -biiisaliM Iac. 



Thorax with two discal si)ots and an antescutellar spot black. 



ti'i|iiiiicl}ita Fall. 



Thorax with two discal spots only, black biiuilOiilatH Ol. 



Legs entirely jiale. 



Thorax with entire disc black llavipos Hal.l. 



Forms of 0. tripunctata var. tripunddtd. 



Head yellow ; thorax with two discal spots only black myopia llahl. 



Head yellow ; thorax with two discal and antescutellar spots black. 



niaiidariiia Fab. 

 Head fuscous ; thorax :is in m<uularina ti'ipiliictala Swed. 



The elytra in mijops usually have the lateral fuscous stri})e only 

 defined ; in the last two the sutural stripe also is well marked. 



O. triptiucf ata Swederus, 1787, vet. Ac. nya Handl. p. 197 ; matidariua Fab., 

 Syst. El. ii, p. 321; Lee, Jour. Acad. Nat. Sci. ser. 2, ii, 152; amiahUis 

 Hald., Tr. Am. Phil. Soc. x, 57 : Lee. 1. c. 152 ; myops Hald., 1. c. ; Lee. 1. c. ; 

 ociUaticoIUg Say, 1824, Jour. Ac. Nat. Sci. iii, 406 ; Lee, ed. ii, 189; bimacii- 

 lata Oliv., 1795, Ent. iv. 68, p. 21, pi. 4, fig. 43 ; tripunctata \\ Fab., Ent. Syst. 

 i, 2. p. 310; Hald., Tr. Am. Phil. Soc. x, 57; Lee, Jour. Ac. Nat. Sci. ser. 2, 

 ii, 153 ; affinis Harris, Ins. Mass. p. 91 ; per-spicillata Hald., 1. c. p. 57 ; haxalis 

 Lee, 1. e 153 ; flavipes Hald., 1. e 57 ; Lee 1. c. 153; texana Horn, Tr. Am. 

 Ent. Soc. vii, 47. 

 Length 8-17.5 mm. ;= .32-.70 inch. Habitat. — Canada, Michigan, Ohio, Penn- 

 sylvania, New York, Ma.s.sachusetts, New Jersey, District of Columbia, 

 Virginia, North Carolina, (xoorgia, Florida, Louisiana, Texas, New Mexico. 

 Colorado, Nebraska, Kansas, Missouri, Illinois, Wisconsin, Iowa. 



In the tripuiictaia group of tripunctata, in addition to the char- 

 acters in the table, it may be stated that the body beneath is entirely 

 fuscous, or pale yellowish with fuscous spots; the elytra flavotesta- 

 ceous with sutural and lateral fuscous stripes ; the antennie annu- 

 lated or not. In mandarina, the underside may be entirely fuscous 

 or variegated with yellow ; in myops the sutural fuscous stripe is 

 wanting, the body beneath is pale with fuscous spots on the sides of 

 the metasternum and second and third ventral segments; amiabilis 

 scarcely differs from mandarina ; the preceding three have the head 

 yellow and the antennse annulated ; another form occurs with the 

 head fuscous and the antennje not annulated. 



In the BIMACUL.A.TA group, ocu/aticollis is entirely black clothed 

 with cinereous pubescence, and the elytra obliquely truncate ; bi- 

 maculata, tripunctata || Fab., affini.-<, basali^i and two unnamed forms 



TRANS. AM. ENT. SOC. XXIII. MAY, 1896 



