IS Circular 100 



stages are passed within the pseudo-bulbs, as coleopterous larva3 

 have been taken from these bulbs and they often contain large cavi- 

 ties and exit holes. .Air. Champion states that this species is allied 

 to C. forbesi Pasc, from Ecuador, found among orchids and that 

 two allied forms occur in Central America, these being C. Nigro 

 maculatits and C. nigro notatiis. Caitleya gigas conies from Colombia 

 which is undoubtedly the home of this species. 



Mr. C C. Champion 19 described this species from a New Jersey 

 specimen as follows : 



Oblong-rhomboidal, robust, black, opaque, the prothroacic tubercles 

 and the rostrum somewhat shining; variegated with dense patches of 

 rather large, imbricate, oval, white scales, which form an oval spot 

 on the median basal lobe of the prothorax, a similar spot on the scutel- 

 lum, a common elongate-subquadrate, post-scutellar patch (enclosing a 

 square bare spot) and two laterally connected fasciae on the elytra (one 

 below the base, narrow, confluent with square basal patch, the other 

 sub-apical, broad, interrupted, and extending obliquely forward to the 

 shoulder), a transverse sinuate fascia on the front of the prosternum, 

 and various spots along the sides of the nieso and metasternum and 

 abdomen, and an interrupted line down the middle of the latter; the 

 tibiae and tarsi thickly, and the bases of the intermediate and posterior 

 femora sparsely, clothed with coarse yellowish hairs. Head rugosely 

 punctuate; rostrum long, curved, moderately stout, widened at the tip, 

 coarsely punctuate, the antennae inserted at the middle. Prothorax 

 transverse, convex rounded at the sides, compressed towards the apex, 

 and rapidly narrowed anteriorly; studded with small, oblique, prom- 

 inent, scattered tubercles. Elytra sub-triangular, at the base much 

 wider than the prothorax; closely seriato-foveolate, the interstices nar- 

 row and unevenly raised, those surrounding the common sub-quadrate 

 basal patch (which appears depressed) very prominent and transversely 

 confluent. Anterior coxae somewhat widely separated, legs long, stout, 

 the femora sharply dentate towards the apex. -Length (excl. rostr. ) 

 11%, breadth 5y 2 mm. 



Mr. H. S. Barber 20 describes what may be this species as Cholus 

 cattleyarum from specimens taken in a greenhouse at Milwaukee, 

 Wis. 



Diorymellus Icevimargo Champ. (Fig. 32) 



This little, black, shiny fellow, which is only 2 mm. long and 1 

 mm. wide and also a member of the Baridce, is sometimes excessively 

 abundant in orchid houses feeding on Cattleyas and Dendrobiums. 

 Caitleya mossice and C. speciosissima have been the ones particularly 

 subject to attack. In addition to feeding on the leaves, pseudo- 

 bulbs and flower stalks, the orchid-growers credit this beetle with 

 doing considerable damage to the flowers and unopened flower buds. 

 Somewhat hard discolorations and spots, usually at the tips and 

 edges of the petals and sepals, surround the feeding punctures. 

 Such markings, of course, make the flowers unsalable or reduce their 

 value. The beetles can be found, sometimes crawling slowly over 



19 Champion, G. C, 1916. On some Weevils Attacking Orchids. /;; 

 Ent. Mo. Magazine, ser. 3, v. 2, p. 200. 



20Barber, H. S., 1916. A New Species of Weevil Injuring Orchids. 

 In Proc. Ent. Soc. Wash., v. 18, p. 177 



