PSTLLOBOEA. 167 



and our examples agree absolutely with the type of P. tardigrada now in Crotch's 

 collection. Two spots near the centre of the elytra unite so as to form a kind of paren- 

 thesis C D, and the upper end of this mark is often united to a spot near the suture, 

 which then on the right hand forms a rough figure of 5. 



We have received many specimens. The figure is taken from one from Guanajuato. 



5. Psyllobora viginti-maculata. 



Coccinella 20-maculata, Say, Journ. Acad. Phil. iv. p. 96 (1824) * ; Complete Writings, ii. p. 234 2 . 

 Psyllobora viginti-maculata, Muls. Spec. Col. Trim, secur. p. 183 3 ; Monogr. Coccin. p. 137 4 ; 



Crotch, Rev. Coccin. p. 141 5 . 

 Psyllobora tcedata, Lee. Rep. Surv. Pacif. ix. p. 70 (1857) V 



Psyllobora viginti-signata, Bohem. Kongl. Svenska Freg. Eugen. Resa, Ins. p. 204 7 . 

 Psyllobora intersparsa, Bohem. loc. cit. p. 204 8 . 



Hab. North America x 2 , United States 3 4 5 , San Francisco 6 , California 5 8 . — Mexico 345 , 

 Northern Sonora (Morrison), Toxpam (Salle) ; British Honduras, Belize (Blancaneaux) ; 

 Guatemala, San Isidro, Aceituno (Champion) ; Nicaragua, Chontales (Janson) ; Panama, 

 Bugaba (Champion). 



This little species, which is widely distributed in the Northern continent of America, 

 is very variable both in size and in the degree to which the markings are confluent. 

 It may be generally distinguished from its nearest allies by its small size (one of the 

 Belize specimens is about 1*5 millim. only in length), by the presence of only two basal 

 spots (which are rather larger than the corresponding spots in P. luctuosa), by the two 

 central and two subapical spots often being united to form a broad letter x, and by the 

 thoracic spots being often united in the longitudinal direction (which they are not in 

 P. luctuosa). Often the elytral spots are all united, and P. tcedata is a variety of 

 this class. 



It is probable that some other so-called species are but local varieties of this insect. 

 Both this and P. luctuosa occurred together at Aceituno. 



According to Crotch 5 , the locality " Colombia " quoted by Mulsant 3 4 belongs to 

 P. liliputiana. Boheman's locality Tahiti 7 is in all probability incorrect. 



6. Psyllobora lutescens. 



Psyllobora lutescens, Crotch, Rev. Coccin. p. 138 \ 

 Hob. Guatemala (Mus. Brit. 1 ). 



" Allied to P. rufosignata, with the ground-colour pale yellow ; the markings are : 

 1 elongate ; 2 ovate, simple ; 3 elongate, sutural, recurved outwards at an acute angle 

 at its base ; 4 oblong, united by a line to 6 ; 5 oblong ; 6—9 subequal, disposed in a 

 cross. Length 2 lin." 



I have not seen an example of this species. 



